The R Project SVN – R – Diff – /trunk/src/modules/internet/nanohttp.c


/*
 *  R : A Computer Language for Statistical Data Analysis
 *  Copyright (C) 2001-12   The R Core Team.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, a copy is available at
 *  http://www.r-project.org/Licenses/
 */
 
/* <UTF8> the only interpretation of char is ASCII 
   <MBCS> all the char quantities should be ASCII
 */
 
 
/* based on libxml2-2.3.6:
 * nanohttp.c: minimalist HTTP GET implementation to fetch external subsets.
 *             focuses on size, streamability, reentrancy and portability
 *
 * This is clearly not a general purpose HTTP implementation
 * If you look for one, check:
 *         http://www.w3.org/Library/
 *
 * See Copyright for the status of this software.
 *
 * daniel@veillard.com
 */
 
 
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
 
#undef HAVE_ZLIB_H
 
#ifdef ENABLE_NLS
#include <libintl.h>
#ifdef Win32
#define _(String) libintl_gettext (String)
#undef gettext /* needed for graphapp */
#else
#define _(String) gettext (String)
#endif
#else /* not NLS */
#define _(String) (String)
#endif
 
extern void R_ProcessEvents(void);
#if !defined(Unix) || defined(HAVE_BSD_NETWORKING)
 
#ifdef Win32
#include <io.h>
#include <winsock2.h>
#ifndef EWOULDBLOCK
# define EWOULDBLOCK             WSAEWOULDBLOCK
#endif
#ifndef EINPROGRESS
# define EINPROGRESS             WSAEINPROGRESS
#endif
#ifndef EALREADY
# define EALREADY                WSAEALREADY
#endif
#define _WINSOCKAPI_
extern void R_FlushConsole(void);
#define R_SelectEx(n,rfd,wrd,efd,tv,ih) select(n,rfd,wrd,efd,tv)
#endif
 
#include <R_ext/R-ftp-http.h>
#ifdef Win32
# include <R_ext/Print.h>
#endif
 
#ifdef HAVE_STRINGS_H
   /* may be needed to define bzero in FD_ZERO (eg AIX) */
  #include <strings.h>
#endif
 
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
 
#ifdef HAVE_BSD_NETWORKING
#  include <netdb.h>
#  include <sys/socket.h>
#  include <netinet/in.h>
#endif
 
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef SUPPORT_IP6
#include <resolv.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
 
/* #define DEBUG_HTTP */
 
#define BAD_CAST (unsigned char *)
 
#if !defined(strdup) && defined(HAVE_DECL_STRDUP) && !HAVE_DECL_STRDUP
extern char *strdup(const char *s1);
#endif
 
#define xmlFree free
#define xmlMalloc malloc
#define xmlRealloc realloc
#define xmlMemStrdup strdup
#define xmlStrndup(a, b) strdup(a)
#define xmlStrstr(a, b) strstr((const char *)a, (const char *)b) 
#define xmlStrdup(a) strdup((char *)a)
 
static void RxmlNanoHTTPScanProxy(const char *URL);
static void *RxmlNanoHTTPMethod(const char *URL, const char *method,
				const char *input, char **contentType,
				const char *headers, const int cacheOK);
 
#ifdef Unix
#include <R_ext/eventloop.h>
 
/* modified from src/unix/sys-std.c  */
static int
setSelectMask(InputHandler *handlers, fd_set *readMask)
{
    int maxfd = -1;
    InputHandler *tmp = handlers;
    FD_ZERO(readMask);
 
    while(tmp) {
	if(tmp->fileDescriptor > 0) {
	    FD_SET(tmp->fileDescriptor, readMask);
	    maxfd = maxfd < tmp->fileDescriptor ? tmp->fileDescriptor : maxfd;
	}
	tmp = tmp->next;
    }
 
    return(maxfd);
}
#endif
 
/**
 * A couple of portability macros
 */
#ifndef _WINSOCKAPI_
#define closesocket(s) close(s)
#define SOCKET int
#endif
 
/* where strncasecmp is defined seems system-specific,
   and on Windows the cross-compiler doesn't find strings.h */
#if defined(HAVE_STRINGS_H) && !defined(Win32)
# include <strings.h>
#endif
#if !defined(strncasecmp) && defined(HAVE_DECL_STRNCASECMP) && !HAVE_DECL_STRNCASECMP
extern int strncasecmp(const char *s1, const char *s2, size_t n);
#endif
#define xmlStrncasecmp(a, b, n) strncasecmp((char *)a, (char *)b, n)
 
#define XML_NANO_HTTP_MAX_REDIR	10
 
#define XML_NANO_HTTP_CHUNK	4096
 
#define XML_NANO_HTTP_CLOSED	0
#define XML_NANO_HTTP_WRITE	1
#define XML_NANO_HTTP_READ	2
#define XML_NANO_HTTP_NONE	4
 
typedef struct RxmlNanoHTTPCtxt {
    char *protocol;	/* the protocol name */
    char *hostname;	/* the host name */
    int port;		/* the port */
    char *path;		/* the path within the URL */
    char *query;	/* the query string */
    SOCKET fd;		/* the file descriptor for the socket */
    int state;		/* WRITE / READ / CLOSED */
    char *out;		/* buffer sent (zero terminated) */
    char *outptr;	/* index within the buffer sent */
    char *in;		/* the receiving buffer */
    char *content;	/* the start of the content */
    char *inptr;	/* the next byte to read from network */
    char *inrptr;	/* the next byte to give back to the client */
    int inlen;		/* len of the input buffer */
    int last;		/* return code for last operation */
    int returnValue;	/* the protocol return value */
    char *statusMsg;    /* the protocol status message */
    char *contentType;	/* the MIME type for the input */
    int contentLength;	/* the reported length */
    char *location;	/* the new URL in case of redirect */
    char *authHeader;	/* contents of {WWW,Proxy}-Authenticate header */
    char *encoding;	/* encoding extracted from the contentType */
    char *mimeType;	/* Mime-Type extracted from the contentType */
#ifdef HAVE_ZLIB_H
    z_stream *strm;	/* Zlib stream object */
    int usesGzip;	/* "Content-Encoding: gzip" was detected */
#endif
} RxmlNanoHTTPCtxt, *RxmlNanoHTTPCtxtPtr;
 
static int initialized = 0;
static char *proxy = NULL;	 /* the proxy name if any */
static int proxyPort;	/* the proxy port if any */
static char *proxyUser; /* the proxy user:pwd if any */
static unsigned int timeout = 60;/* the select() timeout in seconds */
 
/**
 * A portability function
 */
static int socket_errno(void)
{
#ifdef _WINSOCKAPI_
    return(WSAGetLastError());
#else
    return(errno);
#endif
}
 
/**
 * RxmlNanoHTTPInit:
 *
 * Initialize the HTTP protocol layer.
 * Currently it just checks for proxy informations
 */
 
#ifdef Win32
# include "graphapp.h"
#endif
 
static void
RxmlNanoHTTPInit(void)
{
    const char *env;
#ifdef _WINSOCKAPI_
    WSADATA wsaData;
#endif
 
    if (initialized)
	return;
 
#ifdef _WINSOCKAPI_
    if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)
	return;
#endif
 
    if (proxy == NULL) {
	proxyPort = 80;
	env = getenv("no_proxy");
	if (env && ((env[0] == '*') && (env[1] == 0)))
	    goto done;
	env = getenv("http_proxy");
	if (env != NULL) {
	    RxmlNanoHTTPScanProxy(env);
	    goto chkuser;
	}
	env = getenv("HTTP_PROXY");
	if (env != NULL) {
	    RxmlNanoHTTPScanProxy(env);
	    goto chkuser;
	}
    chkuser:
	if((env = getenv("http_proxy_user")) != NULL) {   
	    if (proxyUser != NULL) {xmlFree(proxyUser); proxyUser = NULL;}
#ifdef Win32
	    if (strcmp(env, "ask") == 0) 
		env = askUserPass("Proxy Authentication");
#endif
	    proxyUser = xmlMemStrdup(env);
	}
    }
 done:
    initialized = 1;
}
 
/**
 * RxmlNanoHTTPClenup:
 *
 * Cleanup the HTTP protocol layer.
 */
 
void
RxmlNanoHTTPCleanup(void)
{
    if (proxy != NULL) xmlFree(proxy);
    if (proxyUser != NULL) xmlFree(proxyUser);
#ifdef _WINSOCKAPI_
    if (initialized)
	WSACleanup();
#endif
    initialized = 0;
    return;
}
 
/**
 * RxmlNanoHTTPTimeout:
 * @delay:  the delay in seconds
 *
 * Set the HTTP timeout, (default is 60secs).  0 means immediate
 * return, while -1 infinite.
 */
 
void
RxmlNanoHTTPTimeout(int delay)
{
    timeout = (unsigned int) delay;
}
 
/**
 * RxmlNanoHTTPScanURL:
 * @ctxt:  an HTTP context
 * @URL:  The URL used to initialize the context
 *
 * (Re)Initialize an HTTP context by parsing the URL and finding
 * the protocol host port and path it indicates.
 */
 
/* GET URLs can be very long, so use more generous limit here */
 
static void
RxmlNanoHTTPScanURL(RxmlNanoHTTPCtxtPtr ctxt, const char *URL)
{
    const char *cur = URL;
    char buf[40960];
    int indx = 0;
    int port = 0;
 
    if (ctxt->protocol != NULL) {
        xmlFree(ctxt->protocol);
	ctxt->protocol = NULL;
    }
    if (ctxt->hostname != NULL) {
        xmlFree(ctxt->hostname);
	ctxt->hostname = NULL;
    }
    if (ctxt->path != NULL) {
        xmlFree(ctxt->path);
	ctxt->path = NULL;
    }
    if (URL == NULL) return;
    buf[indx] = 0;
    while (*cur != 0) {
        if ((cur[0] == ':') && (cur[1] == '/') && (cur[2] == '/')) {
	    buf[indx] = 0;
	    ctxt->protocol = xmlMemStrdup(buf);
	    indx = 0;
            cur += 3;
	    break;
	}
	if(indx >= 40959)
	    RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL"));	buf[indx++] = *cur++;
    }
    if (*cur == 0) return;
 
    buf[indx] = 0;
    while (1) {
        if (cur[0] == ':') {
	    buf[indx] = 0;
	    ctxt->hostname = xmlMemStrdup(buf);
	    indx = 0;
	    cur += 1;
	    while ((*cur >= '0') && (*cur <= '9')) {
	        port *= 10;
		port += *cur - '0';
		cur++;
	    }
	    if (port != 0) ctxt->port = port;
	    while ((cur[0] != '/') && (*cur != 0))
	        cur++;
	    break;
	}
        if ((*cur == '/') || (*cur == 0)) {
	    buf[indx] = 0;
	    ctxt->hostname = xmlMemStrdup(buf);
	    indx = 0;
	    break;
	}
	if(indx >= 40959)
	    RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL"));	buf[indx++] = *cur++;
    }
    if (*cur == 0)
        ctxt->path = xmlMemStrdup("/");
    else {
        indx = 0;
        buf[indx] = 0;
	while (*cur != 0) {   
	    if(indx >= 40959)
		RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL"));	   
	    buf[indx++] = *cur++;
	}
	buf[indx] = 0;
	ctxt->path = xmlMemStrdup(buf);
    }
}
 
/**
 * RxmlNanoHTTPScanProxy:
 * @URL:  The proxy URL used to initialize the proxy context
 *
 * (Re)Initialize the HTTP Proxy context by parsing the URL and finding
 * the protocol host port it indicates.
 * Should be like http://myproxy/ or http://myproxy:3128/
 * A NULL URL cleans up proxy informations.
 */
 
void
RxmlNanoHTTPScanProxy(const char *URL)
{
    const char *cur = URL;
    char buf[4096];
    int indx = 0;
    int port = 0;
 
    if (proxy != NULL) {
        xmlFree(proxy);
	proxy = NULL;
    }
    /*if (proxyPort != 0) {
	proxyPort = 0;
	}*/
    if (URL == NULL)
	RxmlMessage(0, _("removing HTTP proxy info"));
    else
	RxmlMessage(1, _("using HTTP proxy '%s'"), URL);
    if (URL == NULL) return;
    buf[indx] = 0;
    while (*cur != 0) {
        if ((cur[0] == ':') && (cur[1] == '/') && (cur[2] == '/')) {
	    buf[indx] = 0;
	    indx = 0;
            cur += 3;
	    break;
	}
	if(indx >= 4095)
	    RxmlMessage(2, _("RxmlNanoHTTPScanProxy: overlong (invalid?) URL"));
	buf[indx++] = *cur++;
    }
    if (*cur == 0) return;
 
    if(strchr(cur, '@')) {
	strcpy(buf, cur);
	*(strchr(buf, '@')) = '\0';
	if(proxyUser) xmlFree(proxyUser);
	proxyUser = xmlMemStrdup(buf);
	cur += (int)strlen(buf) + 1;
    }
    buf[indx] = 0;
    while (1) {
        if (cur[0] == ':') {
	    buf[indx] = 0;
	    proxy = xmlMemStrdup(buf);
	    indx = 0;
	    cur += 1;
	    while ((*cur >= '0') && (*cur <= '9')) {
	        port *= 10;
		port += *cur - '0';
		cur++;
	    }
	    if (port != 0) proxyPort = port;
	    while ((cur[0] != '/') && (*cur != 0))
	        cur++;
	    break;
	}
        if ((*cur == '/') || (*cur == 0)) {
	    buf[indx] = 0;
	    proxy = xmlMemStrdup(buf);
	    indx = 0;
	    break;
	}
	if(indx >= 4095)
	    RxmlMessage(2, _("RxmlNanoHTTPScanProxy: overlong (invalid?) URL"));	buf[indx++] = *cur++;
    }
}
 
/**
 * RxmlNanoHTTPNewCtxt:
 * @URL:  The URL used to initialize the context
 *
 * Allocate and initialize a new HTTP context.
 *
 * Returns an HTTP context or NULL in case of error.
 */
 
static RxmlNanoHTTPCtxtPtr
RxmlNanoHTTPNewCtxt(const char *URL)
{
    RxmlNanoHTTPCtxtPtr ret;
 
    ret = (RxmlNanoHTTPCtxtPtr) xmlMalloc(sizeof(RxmlNanoHTTPCtxt));
    if (ret == NULL) {
        RxmlMessage(1, "error allocating context");
	return(NULL);
    }
 
    memset(ret, 0, sizeof(RxmlNanoHTTPCtxt));
    ret->port = 80;
    ret->returnValue = 0;
    ret->statusMsg = NULL;
    ret->contentLength = -1;
    ret->fd = -1;
 
    RxmlNanoHTTPScanURL(ret, URL);
 
    return(ret);
}
 
/**
 * RxmlNanoHTTPFreeCtxt:
 * @ctxt:  an HTTP context
 *
 * Frees the context after closing the connection.
 */
 
static void
RxmlNanoHTTPFreeCtxt(RxmlNanoHTTPCtxtPtr ctxt)
{
    if (ctxt == NULL) return;
    if (ctxt->hostname != NULL) xmlFree(ctxt->hostname);
    if (ctxt->protocol != NULL) xmlFree(ctxt->protocol);
    if (ctxt->path != NULL) xmlFree(ctxt->path);
    if (ctxt->query != NULL) xmlFree(ctxt->query);
    if (ctxt->out != NULL) xmlFree(ctxt->out);
    if (ctxt->in != NULL) xmlFree(ctxt->in);
    if (ctxt->contentType != NULL) xmlFree(ctxt->contentType);
    if (ctxt->encoding != NULL) xmlFree(ctxt->encoding);
    if (ctxt->mimeType != NULL) xmlFree(ctxt->mimeType);
    if (ctxt->location != NULL) xmlFree(ctxt->location);
    if (ctxt->authHeader != NULL) xmlFree(ctxt->authHeader);
#ifdef HAVE_ZLIB_H
    if (ctxt->strm != NULL) {
	inflateEnd(ctxt->strm);
	xmlFree(ctxt->strm);
    }
#endif
 
    ctxt->state = XML_NANO_HTTP_NONE;
    if (ctxt->fd >= 0) closesocket(ctxt->fd);
    ctxt->fd = -1;
    xmlFree(ctxt);
}
 
/**
 * RxmlNanoHTTPSend:
 * @ctxt:  an HTTP context
 *
 * Send the input needed to initiate the processing on the server side
 */
 
static void
RxmlNanoHTTPSend(RxmlNanoHTTPCtxtPtr ctxt)
{
    if (ctxt->state & XML_NANO_HTTP_WRITE) {
        unsigned int total_sent = 0;
        while (total_sent <strlen(ctxt->outptr)) {
            unsigned int nsent = send(ctxt->fd, ctxt->outptr+total_sent,
                                      strlen(ctxt->outptr)-total_sent, 0);
            if (nsent>0)
                total_sent += nsent;
	}
        ctxt->last = total_sent;
    }
}
 
/**
 * RxmlNanoHTTPRecv:
 * @ctxt:  an HTTP context
 *
 * Read information coming from the HTTP connection.
 * This is a blocking call (but it blocks in select(), not read()).
 *
 * Returns the number of byte read or -1 in case of error.
 */
 
static int
RxmlNanoHTTPRecv(RxmlNanoHTTPCtxtPtr ctxt)
{
    fd_set rfd;
    struct timeval tv;
    double used = 0.0;
 
 
    if (ctxt->state & XML_NANO_HTTP_READ) {
	if (ctxt->in == NULL) {
	    ctxt->in = (char *) xmlMalloc(65000 * sizeof(char));
	    if (ctxt->in == NULL) {
		RxmlMessage(1, "error allocating input");
	        ctxt->last = -1;
		return(-1);
	    }
	    ctxt->inlen = 65000;
	    ctxt->inptr = ctxt->content = ctxt->inrptr = ctxt->in;
	}
	if (ctxt->inrptr > ctxt->in + XML_NANO_HTTP_CHUNK) {
	    int delta = ctxt->inrptr - ctxt->in;
	    int len = ctxt->inptr - ctxt->inrptr;
 
	    memmove(ctxt->in, ctxt->inrptr, len);
	    ctxt->inrptr -= delta;
	    ctxt->content -= delta;
	    ctxt->inptr -= delta;
	}
        if ((ctxt->in + ctxt->inlen) < (ctxt->inptr + XML_NANO_HTTP_CHUNK)) {
	    int d_inptr = ctxt->inptr - ctxt->in;
	    int d_content = ctxt->content - ctxt->in;
	    int d_inrptr = ctxt->inrptr - ctxt->in;
	    char *	tmp_ptr = ctxt->in;
 
	    ctxt->inlen *= 2;
            ctxt->in = (char *) xmlRealloc(tmp_ptr, ctxt->inlen);
	    if (ctxt->in == NULL) {
		RxmlMessage(1, "error allocating input buffer");
		xmlFree( tmp_ptr );
	        ctxt->last = -1;
		return(-1);
	    }
            ctxt->inptr = ctxt->in + d_inptr;
            ctxt->content = ctxt->in + d_content;
            ctxt->inrptr = ctxt->in + d_inrptr;
	}
 
	while(1) {
	    int maxfd = 0, howmany;
	    struct timeval tv_save; /* select() is destructive on Linux, so save tv */
	    R_ProcessEvents();
#ifdef Unix
	    if(R_wait_usec > 0) {
		tv.tv_sec = 0;
		tv.tv_usec = R_wait_usec;
	    } else {
		tv.tv_sec = timeout;
		tv.tv_usec = 0;
	    }
#elif defined(Win32)
	    tv.tv_sec = 0;
	    tv.tv_usec = 2e5;
#else
	    tv.tv_sec = timeout;
	    tv.tv_usec = 0;
#endif
 
	    tv_save = tv;
 
#ifdef Unix
	    maxfd = setSelectMask(R_InputHandlers, &rfd);
#else
	    FD_ZERO(&rfd);
#endif
	    FD_SET(ctxt->fd, &rfd);
	    if(maxfd < ctxt->fd) maxfd = ctxt->fd;
 
	    howmany = R_SelectEx(maxfd+1, &rfd, NULL, NULL, &tv, NULL);
 
	    if (howmany < 0) {
#ifdef DEBUG_HTTP
		perror("select in RxmlNanoHTTPRecv");
#endif
		return(0);
	    }
	    if (howmany == 0) {
		used += tv_save.tv_sec + 1e-6 * tv_save.tv_usec;
		if(used >= timeout) return(0);
		continue;
	    }
 
#ifdef Unix
	    if(!FD_ISSET(ctxt->fd, &rfd) || howmany > 1) {
		/* was one of the extras */
		InputHandler *what;
		what = getSelectedHandler(R_InputHandlers, &rfd);
		if(what != NULL) what->handler((void*) NULL);
		continue;
	    }
#endif
 
	    /* was the socket */
	    ctxt->last = recv(ctxt->fd, ctxt->inptr, XML_NANO_HTTP_CHUNK, 0);
	    if (ctxt->last > 0) {
		ctxt->inptr += ctxt->last;
		return(ctxt->last);
	    }
	    if (ctxt->last == 0) {
		return(0);
	    }
	    if (ctxt->last == -1) {
		switch (socket_errno()) {
		case EINPROGRESS:
		case EWOULDBLOCK:
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
		case EAGAIN:
#endif
		    break;
 
		default:
		    return(0);
		}
	    }
	}
    }
 
    return(0);
}
 
/**
 * RxmlNanoHTTPReadLine:
 * @ctxt:  an HTTP context
 *
 * Read one line in the HTTP server output, usually for extracting
 * the HTTP protocol informations from the answer header.
 *
 * Returns a newly allocated string with a copy of the line, or NULL
 *         which indicate the end of the input.
 */
 
static char *
RxmlNanoHTTPReadLine(RxmlNanoHTTPCtxtPtr ctxt)
{
    char buf[4096];
    char *bp = buf;
    int	rc;
 
    while (bp - buf < 4095) {
	if (ctxt->inrptr == ctxt->inptr) {
	    if ( (rc = RxmlNanoHTTPRecv(ctxt)) == 0) {
		if (bp == buf)
		    return(NULL);
		else
		    *bp = 0;
		return(xmlMemStrdup(buf));
	    }
	    else if ( rc == -1 ) {
	        return ( NULL );
	    }
	}
	*bp = *ctxt->inrptr++;
	if (*bp == '\n') {
	    *bp = 0;
	    return(xmlMemStrdup(buf));
	}
	if (*bp != '\r')
	    bp++;
    }
    buf[4095] = 0;
    return(xmlMemStrdup(buf));
}
 
 
/**
 * RxmlNanoHTTPScanAnswer:
 * @ctxt:  an HTTP context
 * @line:  an HTTP header line
 *
 * Try to extract useful informations from the server answer.
 * We currently parse and process:
 *  - The HTTP revision/ return code
 *  - The Content-Type, Mime-Type and charset used
 *  - The Location for redirect processing.
 *
 * Returns -1 in case of failure, the file descriptor number otherwise
 */
 
static void
RxmlNanoHTTPScanAnswer(RxmlNanoHTTPCtxtPtr ctxt, const char *line)
{
    const char *cur = line;
 
    if (line == NULL) return;
 
    if (!strncmp(line, "HTTP/", 5)) {
        int version = 0;
	int ret = 0;
 
	cur += 5;
	while ((*cur >= '0') && (*cur <= '9')) {
	    version *= 10;
	    version += *cur - '0';
	    cur++;
	}
	if (*cur == '.') {
	    cur++;
	    if ((*cur >= '0') && (*cur <= '9')) {
		version *= 10;
		version += *cur - '0';
		cur++;
	    }
	    while ((*cur >= '0') && (*cur <= '9'))
		cur++;
	} else
	    version *= 10;
	if ((*cur != ' ') && (*cur != '\t')) return;
	while ((*cur == ' ') || (*cur == '\t')) cur++;
	if ((*cur < '0') || (*cur > '9')) return;
	while ((*cur >= '0') && (*cur <= '9')) {
	    ret *= 10;
	    ret += *cur - '0';
	    cur++;
	}
	if ((*cur != 0) && (*cur != ' ') && (*cur != '\t')) return;
	ctxt->returnValue = ret;
	if ((*cur == ' ') || (*cur == '\t')) cur++;
	if(ctxt->statusMsg) xmlFree(ctxt->statusMsg);
	ctxt->statusMsg = xmlMemStrdup(cur);
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Content-Type:", 13)) {
        const char *charset, *last, *mime;
        cur += 13;
	while ((*cur == ' ') || (*cur == '\t')) cur++;
	if (ctxt->contentType != NULL)
	    xmlFree(ctxt->contentType);
	ctxt->contentType = xmlMemStrdup(cur);
	mime = (const char *) cur;
	last = mime;
	while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
	       (*last != ';') && (*last != ','))
	    last++;
	if (ctxt->mimeType != NULL)
	    xmlFree(ctxt->mimeType);
	ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
	charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
	if (charset != NULL) {
	    charset += 8;
	    last = charset;
	    while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
	           (*last != ';') && (*last != ','))
		last++;
	    if (ctxt->encoding != NULL)
	        xmlFree(ctxt->encoding);
	    ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
	}
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"ContentType:", 12)) {
        const char *charset, *last, *mime;
        cur += 12;
	if (ctxt->contentType != NULL) return;
	while ((*cur == ' ') || (*cur == '\t')) cur++;
	ctxt->contentType = xmlMemStrdup(cur);
	mime = (const char *) cur;
	last = mime;
	while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
	       (*last != ';') && (*last != ','))
	    last++;
	if (ctxt->mimeType != NULL)
	    xmlFree(ctxt->mimeType);
	ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
	charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
	if (charset != NULL) {
	    charset += 8;
	    last = charset;
	    while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
	           (*last != ';') && (*last != ','))
		last++;
	    if (ctxt->encoding != NULL)
	        xmlFree(ctxt->encoding);
	    ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
	}
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Content-Length:", 15)) {
        cur += 15;
	while ((*cur == ' ') || (*cur == '\t')) cur++;
	ctxt->contentLength = atoi(cur);
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Location:", 9)) {
        cur += 9;
	while ((*cur == ' ') || (*cur == '\t')) cur++;
	if (ctxt->location != NULL)
	    xmlFree(ctxt->location);
	if (*cur == '/') {
	    char buf[1000];
	    snprintf(buf, 1000, "http://%s%s", ctxt->hostname, cur);
	    ctxt->location = xmlMemStrdup(buf);
	} else {
	    ctxt->location = xmlMemStrdup(cur);
	}
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"WWW-Authenticate:", 17)) {
        cur += 17;
	while ((*cur == ' ') || (*cur == '\t')) cur++;
	if (ctxt->authHeader != NULL)
	    xmlFree(ctxt->authHeader);
	ctxt->authHeader = xmlMemStrdup(cur);
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Proxy-Authenticate:", 19)) {
        cur += 19;
	while ((*cur == ' ') || (*cur == '\t')) cur++;
	if (ctxt->authHeader != NULL)
	    xmlFree(ctxt->authHeader);
	ctxt->authHeader = xmlMemStrdup(cur);
#ifdef HAVE_ZLIB_H
    } else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Encoding:", 17) ) {
	cur += 17;
	while ((*cur == ' ') || (*cur == '\t')) cur++;
	if ( !xmlStrncasecmp( BAD_CAST cur, BAD_CAST"gzip", 4) ) {
	    ctxt->usesGzip = 1;
 
	    ctxt->strm = xmlMalloc(sizeof(z_stream));
 
	    if (ctxt->strm != NULL) {
		ctxt->strm->zalloc = Z_NULL;
		ctxt->strm->zfree = Z_NULL;
		ctxt->strm->opaque = Z_NULL;
		ctxt->strm->avail_in = 0;
		ctxt->strm->next_in = Z_NULL;
 
		inflateInit2( ctxt->strm, 31 );
	    }
	}
#endif
    }
}
 
/**
 * RxmlNanoHTTPConnectAttempt:
 * @addr:  a socket address structure
 *
 * Attempt a connection to the given IP:port endpoint. It forces
 * non-blocking semantic on the socket, and allow 60 seconds for
 * the host to answer.
 *
 * Returns -1 in case of failure, the file descriptor number otherwise
 */
 
static int
RxmlNanoHTTPConnectAttempt(struct sockaddr *addr)
{
    SOCKET s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
    fd_set wfd, rfd;
    struct timeval tv;
    int status = 0;
    double used = 0.0;
 
    if (s==-1) {
#ifdef DEBUG_HTTP
	perror("socket");
#endif
	RxmlMessage(0, "socket failed");
	return(-1);
    }
 
#ifdef _WINSOCKAPI_
    {
	u_long one = 1;
 
	status = ioctlsocket(s, FIONBIO, &one) == SOCKET_ERROR ? -1 : 0;
    }
#else /* _WINSOCKAPI_ */
#if defined(VMS)
    {
	int enable = 1;
	status = ioctl(s, FIONBIO, &enable);
    }
#else /* VMS */
#ifdef HAVE_FCNTL
    if ((status = fcntl(s, F_GETFL, 0)) != -1) {
#ifdef O_NONBLOCK
	status |= O_NONBLOCK;
#else /* O_NONBLOCK */
#ifdef F_NDELAY
	status |= F_NDELAY;
#endif /* F_NDELAY */
#endif /* !O_NONBLOCK */
	status = fcntl(s, F_SETFL, status);
    }
#endif
    if (status < 0) {
#ifdef DEBUG_HTTP
	perror("nonblocking");
#endif
	RxmlMessage(0, "error setting non-blocking IO");
	closesocket(s);
	return(-1);
    }
#endif /* !VMS */
#endif /* !_WINSOCKAPI_ */
 
 
    if ((connect(s, addr, sizeof(*addr))==-1)) {
 
	switch (socket_errno()) {
	case EINPROGRESS:
	case EWOULDBLOCK:
	    break;
	default:
	    perror("connect");
	    closesocket(s);
	    return(-1);
	}
    }
 
    while(1) {
	int maxfd = 0;
	struct timeval tv_save; /* select() is destructive on Linux, so save tv */
	R_ProcessEvents();
#ifdef Unix
	if(R_wait_usec > 0) {
	    tv.tv_sec = 0;
	    tv.tv_usec = R_wait_usec;
	} else {
	    tv.tv_sec = timeout;
	    tv.tv_usec = 0;
	}
#elif defined(Win32)
	tv.tv_sec = 0;
	tv.tv_usec = 2e5;
#else
	tv.tv_sec = timeout;
	tv.tv_usec = 0;
#endif
 
	tv_save = tv;
 
#ifdef Unix
	maxfd = setSelectMask(R_InputHandlers, &rfd);
#else
	FD_ZERO(&rfd);
#endif
	FD_ZERO(&wfd);
	FD_SET(s, &wfd);
	if(maxfd < s) maxfd = s;
 
	switch(R_SelectEx(maxfd+1, &rfd, &wfd, NULL, &tv, NULL))
	{
	case 0:
	    /* Time out */
	    RxmlMessage(0, "Connect attempt timed out");
	    used += tv_save.tv_sec + 1e-6 * tv_save.tv_usec;
	    if(used < timeout) continue;
	    closesocket(s);
	    return(-1);
	case -1:
	    /* Ermm.. ?? */
	    RxmlMessage(0, "Connect failed");
	    closesocket(s);
	    return(-1);
	}
 
	if ( FD_ISSET(s, &wfd) ) {
	    R_SOCKLEN_T len;
	    len = sizeof(status);
	    if (getsockopt(s, SOL_SOCKET, SO_ERROR, (char*)&status, &len) < 0){
		/* Solaris error code */
		return (-1);
	    }
	    if ( status ) {
		RxmlMessage(0, "Error connecting to remote host");
		closesocket(s);
		errno = status;
		return (-1);
	    } else return(s);
#ifdef Unix
	} else { /* some other handler needed */
	    InputHandler *what;
	    what = getSelectedHandler(R_InputHandlers, &rfd);
	    if(what != NULL) what->handler((void*) NULL);
	    continue;
#endif
	}
    }
    /* not reached
    return(-1); */
}
 
/**
 * RxmlNanoHTTPConnectHost:
 * @host:  the host name
 * @port:  the port number
 *
 * Attempt a connection to the given host:port endpoint. It tries
 * the multiple IP provided by the DNS if available.
 *
 * Returns -1 in case of failure, the file descriptor number otherwise
 */
 
static int
RxmlNanoHTTPConnectHost(const char *host, int port)
{
    struct hostent *h;
    struct sockaddr *addr;
    struct in_addr ia;
    struct sockaddr_in sockin;
#ifdef SUPPORT_IP6
    struct in6_addr ia6;
    struct sockaddr_in6 sockin6;
#endif
    int i;
    int s;
 
#if defined(SUPPORT_IP6) && defined(RES_USE_INET6)
    if (!(_res.options & RES_INIT))
	res_init();
    _res.options |= RES_USE_INET6;
#endif
    h=gethostbyname(host);
    if (h==NULL)
    {
	RxmlMessage(2, _("unable to resolve '%s'"), host);
	return(-1);
    }
 
    for(i=0; h->h_addr_list[i]; i++)
    {
	if (h->h_addrtype == AF_INET) {
	    /* A records (IPv4) */
	    memcpy(&ia, h->h_addr_list[i], h->h_length);
	    sockin.sin_family = h->h_addrtype;
	    sockin.sin_addr   = ia;
	    sockin.sin_port   = htons(port);
	    addr = (struct sockaddr *)&sockin;
#ifdef SUPPORT_IP6
	} else if (h->h_addrtype == AF_INET6) {
	    /* AAAA records (IPv6) */
	    memcpy(&ia6, h->h_addr_list[i], h->h_length);
	    sockin6.sin_family = h->h_addrtype;
	    sockin6.sin_addr   = ia6;
	    sockin6.sin_port   = htons(port);
	    addr = (struct sockaddr *)&sockin6;
#endif
	} else
	    break; /* for */
 
	s = RxmlNanoHTTPConnectAttempt(addr);
	if (s != -1) {
	    RxmlMessage(1, _("connected to '%s' on port %d."), host, port);
	    return(s);
	}
    }
 
    RxmlMessage(2, _("unable to connect to '%s' on port %d."), host, port);
    return(-1);
}
 
 
/**
 * RxmlNanoHTTPOpen:
 * @URL:  The URL to load
 * @contentType:  if available the Content-Type information will be
 *                returned at that location
 *
 * @headers: headers to be used in the HTTP request.  These must be name/value
 *           pairs separated by ':', each on their own line.
 *
 * This function try to open a connection to the indicated resource
 * via HTTP GET.
 *
 * Returns NULL in case of failure, otherwise a request handler.
 *     The contentType, if provided must be freed by the caller
 */
 
void*
RxmlNanoHTTPOpen(const char *URL, char **contentType, const char *headers,
                 int cacheOK)
{
    if (contentType != NULL) *contentType = NULL;
    return RxmlNanoHTTPMethod(URL, NULL, NULL, contentType, headers, cacheOK);
}
 
/**
 * RxmlNanoHTTPRead:
 * @ctx:  the HTTP context
 * @dest:  a buffer
 * @len:  the buffer length
 *
 * This function tries to read @len bytes from the existing HTTP connection
 * and saves them in @dest. This is a blocking call.
 *
 * Returns the number of byte read. 0 is an indication of an end of connection.
 *         -1 indicates a parameter error.
 */
int
RxmlNanoHTTPRead(void *ctx, void *dest, int len)
{
    RxmlNanoHTTPCtxtPtr ctxt = (RxmlNanoHTTPCtxtPtr) ctx;
 
#ifdef HAVE_ZLIB_H
    int bytes_read = 0;
    int orig_avail_in;
    int z_ret;
#endif
 
    if (ctx == NULL) return(-1);
    if (dest == NULL) return(-1);
    if (len <= 0) return(0);
 
#ifdef HAVE_ZLIB_H
    if (ctxt->usesGzip == 1) {
        if (ctxt->strm == NULL) return(0);
 
        ctxt->strm->next_out = dest;
        ctxt->strm->avail_out = len;
 
        do {
            orig_avail_in = ctxt->strm->avail_in = ctxt->inptr - ctxt->inrptr - bytes_read;
            ctxt->strm->next_in = BAD_CAST (ctxt->inrptr + bytes_read);
 
            z_ret = inflate(ctxt->strm, Z_NO_FLUSH);
            bytes_read += orig_avail_in - ctxt->strm->avail_in;
 
            if (z_ret != Z_OK) break;
        } while (ctxt->strm->avail_out > 0 && RxmlNanoHTTPRecv(ctxt) > 0);
 
        ctxt->inrptr += bytes_read;
        return(len - ctxt->strm->avail_out);
    }
#endif
 
    while (ctxt->inptr - ctxt->inrptr < len) {
        if (RxmlNanoHTTPRecv(ctxt) <= 0) break;
    }
    if (ctxt->inptr - ctxt->inrptr < len)
        len = ctxt->inptr - ctxt->inrptr;
    memcpy(dest, ctxt->inrptr, len);
    ctxt->inrptr += len;
    return(len);
}
 
static void base64_encode(char *proxyUser, char *out)
{
    /* Conversion table.  */
    static char tbl[64] = {
	'A','B','C','D','E','F','G','H',
	'I','J','K','L','M','N','O','P',
	'Q','R','S','T','U','V','W','X',
	'Y','Z','a','b','c','d','e','f',
	'g','h','i','j','k','l','m','n',
	'o','p','q','r','s','t','u','v',
	'w','x','y','z','0','1','2','3',
	'4','5','6','7','8','9','+','/'
    };
    char *s = proxyUser;
    int i, length;
    unsigned char *p = (unsigned char *)out;
 
    length = (int) strlen(s);
    for (i = 0; i < length; i += 3) {
	*p++ = tbl[s[i] >> 2];
	*p++ = tbl[((s[i] & 3) << 4) + (s[i+1] >> 4)];
	*p++ = tbl[((s[i+1] & 0xf) << 2) + (s[i+2] >> 6)];
	*p++ = tbl[s[i+2] & 0x3f];
    }
    /* Pad the result if necessary...  */
    if (i == length + 1) *(p - 1) = '=';
    else if (i == length + 2) *(p - 1) = *(p - 2) = '=';
    /* ...and zero-terminate it.  */
    *p = '\0';
}
 
/**
 * RxmlNanoHTTPClose:
 * @ctx:  the HTTP context
 *
 * This function closes an HTTP context, it ends up the connection and
 * free all data related to it.
 */
void
RxmlNanoHTTPClose(void *ctx)
{
    RxmlNanoHTTPCtxtPtr ctxt = (RxmlNanoHTTPCtxtPtr) ctx;
 
    if (ctx == NULL) return;
 
    RxmlNanoHTTPFreeCtxt(ctxt);
}
 
/**
 * RxmlNanoHTTPMethod:
 * @URL:  The URL to load
 * @method:  the HTTP method to use
 * @input:  the input string if any
 * @contentType:  the Content-Type information IN and OUT
 * @headers:  the extra headers
 *
 * This function try to open a connection to the indicated resource
 * via HTTP using the given @method, adding the given extra headers
 * and the input buffer for the request content.
 *
 * Returns NULL in case of failure, otherwise a request handler.
 *     The contentType, if provided must be freed by the caller
 */
 
void*
RxmlNanoHTTPMethod(const char *URL, const char *method, const char *input,
                  char **contentType, const char *headers, const int cacheOK)
{
    RxmlNanoHTTPCtxtPtr ctxt;
    char *bp, *p;
    int blen, ilen, ret;
    int head;
    int nbRedirects = 0;
#ifdef Win32
    int nAuthenticate = 0;
#endif
    char *redirURL = NULL;
    char buf[1000];
 
    if (URL == NULL) return(NULL);
    if (method == NULL) method = "GET";
    RxmlNanoHTTPInit();
 
 retry:
    if (redirURL == NULL)
	ctxt = RxmlNanoHTTPNewCtxt(URL);
    else {
	ctxt = RxmlNanoHTTPNewCtxt(redirURL);
	xmlFree(redirURL);
	redirURL = NULL;
    }
 
    if ((ctxt->protocol == NULL) || (strcmp(ctxt->protocol, "http"))) {
	RxmlMessage(0, "Not a valid HTTP URI");
        RxmlNanoHTTPFreeCtxt(ctxt);
	if (redirURL != NULL) xmlFree(redirURL);
        return(NULL);
    }
    if (ctxt->hostname == NULL) {
	RxmlMessage(0, "Failed to identify host in URI");
        RxmlNanoHTTPFreeCtxt(ctxt);
        return(NULL);
    }
    if (proxy) {
	blen = (int) strlen(ctxt->hostname) * 2 + 16;
	ret = RxmlNanoHTTPConnectHost(proxy, proxyPort);
    }
    else {
	blen = (int) strlen(ctxt->hostname);
	ret = RxmlNanoHTTPConnectHost(ctxt->hostname, ctxt->port);
    }
    if (ret < 0) {
        RxmlNanoHTTPFreeCtxt(ctxt);
        return(NULL);
    }
    ctxt->fd = ret;
 
    if (input != NULL) {
	ilen = (int) strlen(input);
	blen += ilen + 32;
    }
    else
	ilen = 0;
    if (!cacheOK)
	blen += 20;
    if (headers != NULL)
	blen += (int) strlen(headers) + 2;
    if (contentType && *contentType)
	blen += (int) strlen(*contentType) + 16;
    if (proxy && proxyUser) {
	base64_encode(proxyUser,  buf);
	blen += (int )strlen(buf) + 50;
    }
    blen += (int) strlen(method) + (int) strlen(ctxt->path) + 23;
#ifdef HAVE_ZLIB_H
    blen += 23;
#endif
    p = bp = xmlMalloc(blen + 8);
    memset(p, 0, blen + 8);
    if (proxy) {
	if (ctxt->port != 80) {
	    p += snprintf( p, blen - (p - bp), "%s http://%s:%d%s", 
			method, ctxt->hostname,
		 	ctxt->port, ctxt->path );
	}
	else
	    p += snprintf( p, blen - (p - bp), "%s http://%s%s", method,
	    		ctxt->hostname, ctxt->path);
    }
    else
	p += snprintf(p, blen - (p - bp), "%s %s", method, ctxt->path);
 
    p += snprintf(p,  blen - (p - bp), " HTTP/1.0\r\nHost: %s\r\n",
		  ctxt->hostname);
 
#ifdef HAVE_ZLIB_H
    p += snprintf(p, blen - (p - bp), "Accept-Encoding: gzip\r\n");
#endif
 
    if(!cacheOK)
	p += snprintf(p, blen - (p - bp), "Pragma: no-cache\r\n");
    if(proxy && proxyUser)
	p += snprintf(p, blen - (p - bp),"Proxy-Authorization: Basic %s\r\n", 
		      buf);
    if (contentType != NULL && *contentType)
	p += snprintf(p, blen - (p - bp), "Content-Type: %s\r\n", *contentType);
    if (headers != NULL)
	p += snprintf(p, blen - (p - bp), "%s", headers);
    if (input != NULL)
 
	snprintf(p, blen - (p - bp), "Content-Length: %d\r\n\r\n%s", 
		 ilen, input);
    else
	snprintf(p, blen - (p - bp), "\r\n");
    RxmlMessage(0, "-> %s%s", proxy? "(Proxy) " : "", bp);
    if ((blen -= (int) strlen(bp)+1) < 0)
	RxmlMessage(0, "ERROR: overflowed buffer by %d bytes\n", -blen);
    ctxt->outptr = ctxt->out = bp;
    ctxt->state = XML_NANO_HTTP_WRITE;
    RxmlNanoHTTPSend(ctxt);
    ctxt->state = XML_NANO_HTTP_READ;
    head = 1;
 
    while ((p = RxmlNanoHTTPReadLine(ctxt)) != NULL) {
        if (head && (*p == 0)) {
	    head = 0;
	    ctxt->content = ctxt->inrptr;
	    xmlFree(p);
	    break;
	}
	RxmlNanoHTTPScanAnswer(ctxt, p);
 
	RxmlMessage(0, "<- %s\n", p);
        xmlFree(p);
    }
 
#ifdef Win32
    /* Prompt for username/password again if status was proxy
       authentication failure */
    if(proxy && !nAuthenticate && ctxt->returnValue == 407) {
	char *env;
	REprintf("%s\n%s\n", "Proxy authentication failed:",
		"\tplease re-enter the credentials or hit Cancel");
	R_FlushConsole(); R_ProcessEvents();
	env = askUserPass("Proxy Authentication");
	if(strlen(env)) {
	    if (proxyUser != NULL) {xmlFree(proxyUser); proxyUser = NULL;}
	    proxyUser = xmlMemStrdup(env);
	    nAuthenticate++;
	    goto retry;
	}
    }
#endif
 
    if ((ctxt->location != NULL) && (ctxt->returnValue >= 300) &&
        (ctxt->returnValue < 400)) {
	RxmlMessage(1, _("redirect to: '%s'"), ctxt->location);
	while (RxmlNanoHTTPRecv(ctxt)) 
	    ;  // clang likes this on a separate line
        if (nbRedirects < XML_NANO_HTTP_MAX_REDIR) {
	    nbRedirects++;
	    redirURL = xmlMemStrdup(ctxt->location);
	    fflush(stdout);
	    RxmlNanoHTTPFreeCtxt(ctxt);
	    goto retry;
	}
	RxmlNanoHTTPFreeCtxt(ctxt);
	RxmlMessage(2, _("too many redirects, aborting ..."));
	return(NULL);
 
    }
 
    if (contentType != NULL) {
	if (ctxt->contentType != NULL)
	    *contentType = xmlMemStrdup(ctxt->contentType);
	else
	    *contentType = NULL;
    }
 
    if (ctxt->contentType != NULL)
	RxmlMessage(1, "Code %d, content-type '%s'",
		    ctxt->returnValue, ctxt->contentType);
    else
	RxmlMessage(1, "Code %d, no content-type",
		    ctxt->returnValue);
 
    return((void *) ctxt);
}
 
 
 
/**
 * RxmlNanoHTTPReturnCode:
 * @ctx:  the HTTP context
 *
 * Returns the HTTP return code for the request.
 */
int
RxmlNanoHTTPReturnCode(void *ctx)
{
    RxmlNanoHTTPCtxtPtr ctxt = (RxmlNanoHTTPCtxtPtr) ctx;
 
    if (ctxt == NULL) return(-1);
 
    return(ctxt->returnValue);
}
 
char *
RxmlNanoHTTPStatusMsg(void *ctx)
{
    RxmlNanoHTTPCtxtPtr ctxt = (RxmlNanoHTTPCtxtPtr) ctx;
    return(ctxt->statusMsg);
}
 
int
RxmlNanoHTTPContentLength(void *ctx)
{
    RxmlNanoHTTPCtxtPtr ctxt = (RxmlNanoHTTPCtxtPtr) ctx;
 
    if (ctxt == NULL) return(-1);
 
    return(ctxt->contentLength);
}
 
char *
RxmlNanoHTTPContentType(void *ctx)
{
    RxmlNanoHTTPCtxtPtr ctxt = (RxmlNanoHTTPCtxtPtr) ctx;
    return(ctxt->contentType);
}
#endif /* !Unix or BSD_NETWORKING */

Rev 61850	Rev 62559
1	`/*`	1	`/*`
2	`* R : A Computer Language for Statistical Data Analysis`	2	`* R : A Computer Language for Statistical Data Analysis`
3	`* Copyright (C) 2001-12 The R Core Team.`	3	`* Copyright (C) 2001-12 The R Core Team.`
4	`*`	4	`*`
5	`* This program is free software; you can redistribute it and/or modify`	5	`* This program is free software; you can redistribute it and/or modify`
6	`* it under the terms of the GNU General Public License as published by`	6	`* it under the terms of the GNU General Public License as published by`
7	`* the Free Software Foundation; either version 2 of the License, or`	7	`* the Free Software Foundation; either version 2 of the License, or`
8	`* (at your option) any later version.`	8	`* (at your option) any later version.`
9	`*`	9	`*`
10	`* This program is distributed in the hope that it will be useful,`	10	`* This program is distributed in the hope that it will be useful,`
11	`* but WITHOUT ANY WARRANTY; without even the implied warranty of`	11	`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
12	`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`	12	`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
13	`* GNU General Public License for more details.`	13	`* GNU General Public License for more details.`
14	`*`	14	`*`
15	`* You should have received a copy of the GNU General Public License`	15	`* You should have received a copy of the GNU General Public License`
16	`* along with this program; if not, a copy is available at`	16	`* along with this program; if not, a copy is available at`
17	`* http://www.r-project.org/Licenses/`	17	`* http://www.r-project.org/Licenses/`
18	`*/`	18	`*/`
19		19
20	`/* <UTF8> the only interpretation of char is ASCII`	20	`/* <UTF8> the only interpretation of char is ASCII`
21	`<MBCS> all the char quantities should be ASCII`	21	`<MBCS> all the char quantities should be ASCII`
22	`*/`	22	`*/`
23		23
24		24
25	`/* based on libxml2-2.3.6:`	25	`/* based on libxml2-2.3.6:`
26	`* nanohttp.c: minimalist HTTP GET implementation to fetch external subsets.`	26	`* nanohttp.c: minimalist HTTP GET implementation to fetch external subsets.`
27	`* focuses on size, streamability, reentrancy and portability`	27	`* focuses on size, streamability, reentrancy and portability`
28	`*`	28	`*`
29	`* This is clearly not a general purpose HTTP implementation`	29	`* This is clearly not a general purpose HTTP implementation`
30	`* If you look for one, check:`	30	`* If you look for one, check:`
31	`* http://www.w3.org/Library/`	31	`* http://www.w3.org/Library/`
32	`*`	32	`*`
33	`* See Copyright for the status of this software.`	33	`* See Copyright for the status of this software.`
34	`*`	34	`*`
35	`* daniel@veillard.com`	35	`* daniel@veillard.com`
36	`*/`	36	`*/`
37		37
38		38
39	`#ifdef HAVE_CONFIG_H`	39	`#ifdef HAVE_CONFIG_H`
40	`#include <config.h>`	40	`#include <config.h>`
41	`#endif`	41	`#endif`
42		42
43	`#undef HAVE_ZLIB_H`	43	`#undef HAVE_ZLIB_H`
44		44
45	`#ifdef ENABLE_NLS`	45	`#ifdef ENABLE_NLS`
46	`#include <libintl.h>`	46	`#include <libintl.h>`
47	`#ifdef Win32`	47	`#ifdef Win32`
48	`#define _(String) libintl_gettext (String)`	48	`#define _(String) libintl_gettext (String)`
49	`#undef gettext /* needed for graphapp */`	49	`#undef gettext /* needed for graphapp */`
50	`#else`	50	`#else`
51	`#define _(String) gettext (String)`	51	`#define _(String) gettext (String)`
52	`#endif`	52	`#endif`
53	`#else /* not NLS */`	53	`#else /* not NLS */`
54	`#define _(String) (String)`	54	`#define _(String) (String)`
55	`#endif`	55	`#endif`
56		56
57	`extern void R_ProcessEvents(void);`	57	`extern void R_ProcessEvents(void);`
58	`#if !defined(Unix) \|\| defined(HAVE_BSD_NETWORKING)`	58	`#if !defined(Unix) \|\| defined(HAVE_BSD_NETWORKING)`
59		59
60	`#ifdef Win32`	60	`#ifdef Win32`
61	`#include <io.h>`	61	`#include <io.h>`
62	`#include <winsock2.h>`	62	`#include <winsock2.h>`
63	`#ifndef EWOULDBLOCK`	63	`#ifndef EWOULDBLOCK`
64	`# define EWOULDBLOCK WSAEWOULDBLOCK`	64	`# define EWOULDBLOCK WSAEWOULDBLOCK`
65	`#endif`	65	`#endif`
66	`#ifndef EINPROGRESS`	66	`#ifndef EINPROGRESS`
67	`# define EINPROGRESS WSAEINPROGRESS`	67	`# define EINPROGRESS WSAEINPROGRESS`
68	`#endif`	68	`#endif`
69	`#ifndef EALREADY`	69	`#ifndef EALREADY`
70	`# define EALREADY WSAEALREADY`	70	`# define EALREADY WSAEALREADY`
71	`#endif`	71	`#endif`
72	`#define _WINSOCKAPI_`	72	`#define _WINSOCKAPI_`
73	`extern void R_FlushConsole(void);`	73	`extern void R_FlushConsole(void);`
74	`#define R_SelectEx(n,rfd,wrd,efd,tv,ih) select(n,rfd,wrd,efd,tv)`	74	`#define R_SelectEx(n,rfd,wrd,efd,tv,ih) select(n,rfd,wrd,efd,tv)`
75	`#endif`	75	`#endif`
76		76
77	`#include <R_ext/R-ftp-http.h>`	77	`#include <R_ext/R-ftp-http.h>`
78	`#ifdef Win32`	78	`#ifdef Win32`
79	`# include <R_ext/Print.h>`	79	`# include <R_ext/Print.h>`
80	`#endif`	80	`#endif`
81		81
82	`#ifdef HAVE_STRINGS_H`	82	`#ifdef HAVE_STRINGS_H`
83	`/* may be needed to define bzero in FD_ZERO (eg AIX) */`	83	`/* may be needed to define bzero in FD_ZERO (eg AIX) */`
84	`#include <strings.h>`	84	`#include <strings.h>`
85	`#endif`	85	`#endif`
86		86
87	`#include <stdio.h>`	87	`#include <stdio.h>`
88	`#include <string.h>`	88	`#include <string.h>`
89	`#include <stdlib.h>`	89	`#include <stdlib.h>`
90		90
91	`#ifdef HAVE_UNISTD_H`	91	`#ifdef HAVE_UNISTD_H`
92	`#include <unistd.h>`	92	`#include <unistd.h>`
93	`#endif`	93	`#endif`
94		94
95	`#ifdef HAVE_BSD_NETWORKING`	95	`#ifdef HAVE_BSD_NETWORKING`
96	`# include <netdb.h>`	96	`# include <netdb.h>`
97	`# include <sys/socket.h>`	97	`# include <sys/socket.h>`
98	`# include <netinet/in.h>`	98	`# include <netinet/in.h>`
99	`#endif`	99	`#endif`
100		100
101	`#ifdef HAVE_FCNTL_H`	101	`#ifdef HAVE_FCNTL_H`
102	`#include <fcntl.h>`	102	`#include <fcntl.h>`
103	`#endif`	103	`#endif`
104	`#ifdef HAVE_ERRNO_H`	104	`#ifdef HAVE_ERRNO_H`
105	`#include <errno.h>`	105	`#include <errno.h>`
106	`#endif`	106	`#endif`
107	`#ifdef HAVE_SYS_TIME_H`	107	`#ifdef HAVE_SYS_TIME_H`
108	`#include <sys/time.h>`	108	`#include <sys/time.h>`
109	`#endif`	109	`#endif`
110	`#ifdef HAVE_SYS_SELECT_H`	110	`#ifdef HAVE_SYS_SELECT_H`
111	`#include <sys/select.h>`	111	`#include <sys/select.h>`
112	`#endif`	112	`#endif`
113	`#ifdef SUPPORT_IP6`	113	`#ifdef SUPPORT_IP6`
114	`#include <resolv.h>`	114	`#include <resolv.h>`
115	`#endif`	115	`#endif`
116	`#ifdef HAVE_ZLIB_H`	116	`#ifdef HAVE_ZLIB_H`
117	`#include <zlib.h>`	117	`#include <zlib.h>`
118	`#endif`	118	`#endif`
119		119
120	`/* #define DEBUG_HTTP */`	120	`/* #define DEBUG_HTTP */`
121		121
122	`#define BAD_CAST (unsigned char *)`	122	`#define BAD_CAST (unsigned char *)`
123		123
124	`#if !defined(strdup) && defined(HAVE_DECL_STRDUP) && !HAVE_DECL_STRDUP`	124	`#if !defined(strdup) && defined(HAVE_DECL_STRDUP) && !HAVE_DECL_STRDUP`
125	`extern char strdup(const char s1);`	125	`extern char strdup(const char s1);`
126	`#endif`	126	`#endif`
127		127
128	`#define xmlFree free`	128	`#define xmlFree free`
129	`#define xmlMalloc malloc`	129	`#define xmlMalloc malloc`
130	`#define xmlRealloc realloc`	130	`#define xmlRealloc realloc`
131	`#define xmlMemStrdup strdup`	131	`#define xmlMemStrdup strdup`
132	`#define xmlStrndup(a, b) strdup(a)`	132	`#define xmlStrndup(a, b) strdup(a)`
133	`#define xmlStrstr(a, b) strstr((const char )a, (const char )b)`	133	`#define xmlStrstr(a, b) strstr((const char )a, (const char )b)`
134	`#define xmlStrdup(a) strdup((char *)a)`	134	`#define xmlStrdup(a) strdup((char *)a)`
135		135
136	`static void RxmlNanoHTTPScanProxy(const char *URL);`	136	`static void RxmlNanoHTTPScanProxy(const char *URL);`
137	`static void RxmlNanoHTTPMethod(const char URL, const char *method,`	137	`static void RxmlNanoHTTPMethod(const char URL, const char *method,`
138	`const char input, char *contentType,`	138	`const char input, char *contentType,`
139	`const char *headers, const int cacheOK);`	139	`const char *headers, const int cacheOK);`
140		140
141	`#ifdef Unix`	141	`#ifdef Unix`
142	`#include <R_ext/eventloop.h>`	142	`#include <R_ext/eventloop.h>`
143		143
144	`/* modified from src/unix/sys-std.c */`	144	`/* modified from src/unix/sys-std.c */`
145	`static int`	145	`static int`
146	`setSelectMask(InputHandler handlers, fd_set readMask)`	146	`setSelectMask(InputHandler handlers, fd_set readMask)`
147	`{`	147	`{`
148	`int maxfd = -1;`	148	`int maxfd = -1;`
149	`InputHandler *tmp = handlers;`	149	`InputHandler *tmp = handlers;`
150	`FD_ZERO(readMask);`	150	`FD_ZERO(readMask);`
151		151
152	`while(tmp) {`	152	`while(tmp) {`
153	`if(tmp->fileDescriptor > 0) {`	153	`if(tmp->fileDescriptor > 0) {`
154	`FD_SET(tmp->fileDescriptor, readMask);`	154	`FD_SET(tmp->fileDescriptor, readMask);`
155	`maxfd = maxfd < tmp->fileDescriptor ? tmp->fileDescriptor : maxfd;`	155	`maxfd = maxfd < tmp->fileDescriptor ? tmp->fileDescriptor : maxfd;`
156	`}`	156	`}`
157	`tmp = tmp->next;`	157	`tmp = tmp->next;`
158	`}`	158	`}`
159		159
160	`return(maxfd);`	160	`return(maxfd);`
161	`}`	161	`}`
162	`#endif`	162	`#endif`
163		163
164	`/**`	164	`/**`
165	`* A couple of portability macros`	165	`* A couple of portability macros`
166	`*/`	166	`*/`
167	`#ifndef _WINSOCKAPI_`	167	`#ifndef _WINSOCKAPI_`
168	`#define closesocket(s) close(s)`	168	`#define closesocket(s) close(s)`
169	`#define SOCKET int`	169	`#define SOCKET int`
170	`#endif`	170	`#endif`
171		171
172	`/* where strncasecmp is defined seems system-specific,`	172	`/* where strncasecmp is defined seems system-specific,`
173	`and on Windows the cross-compiler doesn't find strings.h */`	173	`and on Windows the cross-compiler doesn't find strings.h */`
174	`#if defined(HAVE_STRINGS_H) && !defined(Win32)`	174	`#if defined(HAVE_STRINGS_H) && !defined(Win32)`
175	`# include <strings.h>`	175	`# include <strings.h>`
176	`#endif`	176	`#endif`
177	`#if !defined(strncasecmp) && defined(HAVE_DECL_STRNCASECMP) && !HAVE_DECL_STRNCASECMP`	177	`#if !defined(strncasecmp) && defined(HAVE_DECL_STRNCASECMP) && !HAVE_DECL_STRNCASECMP`
178	`extern int strncasecmp(const char s1, const char s2, size_t n);`	178	`extern int strncasecmp(const char s1, const char s2, size_t n);`
179	`#endif`	179	`#endif`
180	`#define xmlStrncasecmp(a, b, n) strncasecmp((char )a, (char )b, n)`	180	`#define xmlStrncasecmp(a, b, n) strncasecmp((char )a, (char )b, n)`
181		181
182	`#define XML_NANO_HTTP_MAX_REDIR 10`	182	`#define XML_NANO_HTTP_MAX_REDIR 10`
183		183
184	`#define XML_NANO_HTTP_CHUNK 4096`	184	`#define XML_NANO_HTTP_CHUNK 4096`
185		185
186	`#define XML_NANO_HTTP_CLOSED 0`	186	`#define XML_NANO_HTTP_CLOSED 0`
187	`#define XML_NANO_HTTP_WRITE 1`	187	`#define XML_NANO_HTTP_WRITE 1`
188	`#define XML_NANO_HTTP_READ 2`	188	`#define XML_NANO_HTTP_READ 2`
189	`#define XML_NANO_HTTP_NONE 4`	189	`#define XML_NANO_HTTP_NONE 4`
190		190
191	`typedef struct RxmlNanoHTTPCtxt {`	191	`typedef struct RxmlNanoHTTPCtxt {`
192	`char protocol; / the protocol name */`	192	`char protocol; / the protocol name */`
193	`char hostname; / the host name */`	193	`char hostname; / the host name */`
194	`int port; /* the port */`	194	`int port; /* the port */`
195	`char path; / the path within the URL */`	195	`char path; / the path within the URL */`
196	`char query; / the query string */`	196	`char query; / the query string */`
197	`SOCKET fd; /* the file descriptor for the socket */`	197	`SOCKET fd; /* the file descriptor for the socket */`
198	`int state; /* WRITE / READ / CLOSED */`	198	`int state; /* WRITE / READ / CLOSED */`
199	`char out; / buffer sent (zero terminated) */`	199	`char out; / buffer sent (zero terminated) */`
200	`char outptr; / index within the buffer sent */`	200	`char outptr; / index within the buffer sent */`
201	`char in; / the receiving buffer */`	201	`char in; / the receiving buffer */`
202	`char content; / the start of the content */`	202	`char content; / the start of the content */`
203	`char inptr; / the next byte to read from network */`	203	`char inptr; / the next byte to read from network */`
204	`char inrptr; / the next byte to give back to the client */`	204	`char inrptr; / the next byte to give back to the client */`
205	`int inlen; /* len of the input buffer */`	205	`int inlen; /* len of the input buffer */`
206	`int last; /* return code for last operation */`	206	`int last; /* return code for last operation */`
207	`int returnValue; /* the protocol return value */`	207	`int returnValue; /* the protocol return value */`
208	`char statusMsg; / the protocol status message */`	208	`char statusMsg; / the protocol status message */`
209	`char contentType; / the MIME type for the input */`	209	`char contentType; / the MIME type for the input */`
210	`int contentLength; /* the reported length */`	210	`int contentLength; /* the reported length */`
211	`char location; / the new URL in case of redirect */`	211	`char location; / the new URL in case of redirect */`
212	`char authHeader; / contents of {WWW,Proxy}-Authenticate header */`	212	`char authHeader; / contents of {WWW,Proxy}-Authenticate header */`
213	`char encoding; / encoding extracted from the contentType */`	213	`char encoding; / encoding extracted from the contentType */`
214	`char mimeType; / Mime-Type extracted from the contentType */`	214	`char mimeType; / Mime-Type extracted from the contentType */`
215	`#ifdef HAVE_ZLIB_H`	215	`#ifdef HAVE_ZLIB_H`
216	`z_stream strm; / Zlib stream object */`	216	`z_stream strm; / Zlib stream object */`
217	`int usesGzip; /* "Content-Encoding: gzip" was detected */`	217	`int usesGzip; /* "Content-Encoding: gzip" was detected */`
218	`#endif`	218	`#endif`
219	`} RxmlNanoHTTPCtxt, *RxmlNanoHTTPCtxtPtr;`	219	`} RxmlNanoHTTPCtxt, *RxmlNanoHTTPCtxtPtr;`
220		220
221	`static int initialized = 0;`	221	`static int initialized = 0;`
222	`static char proxy = NULL; / the proxy name if any */`	222	`static char proxy = NULL; / the proxy name if any */`
223	`static int proxyPort; /* the proxy port if any */`	223	`static int proxyPort; /* the proxy port if any */`
224	`static char proxyUser; / the proxy user:pwd if any */`	224	`static char proxyUser; / the proxy user:pwd if any */`
225	`static unsigned int timeout = 60;/* the select() timeout in seconds */`	225	`static unsigned int timeout = 60;/* the select() timeout in seconds */`
226		226
227	`/**`	227	`/**`
228	`* A portability function`	228	`* A portability function`
229	`*/`	229	`*/`
230	`static int socket_errno(void)`	230	`static int socket_errno(void)`
231	`{`	231	`{`
232	`#ifdef _WINSOCKAPI_`	232	`#ifdef _WINSOCKAPI_`
233	`return(WSAGetLastError());`	233	`return(WSAGetLastError());`
234	`#else`	234	`#else`
235	`return(errno);`	235	`return(errno);`
236	`#endif`	236	`#endif`
237	`}`	237	`}`
238		238
239	`/**`	239	`/**`
240	`* RxmlNanoHTTPInit:`	240	`* RxmlNanoHTTPInit:`
241	`*`	241	`*`
242	`* Initialize the HTTP protocol layer.`	242	`* Initialize the HTTP protocol layer.`
243	`* Currently it just checks for proxy informations`	243	`* Currently it just checks for proxy informations`
244	`*/`	244	`*/`
245		245
246	`#ifdef Win32`	246	`#ifdef Win32`
247	`# include "graphapp.h"`	247	`# include "graphapp.h"`
248	`#endif`	248	`#endif`
249		249
250	`static void`	250	`static void`
251	`RxmlNanoHTTPInit(void)`	251	`RxmlNanoHTTPInit(void)`
252	`{`	252	`{`
253	`const char *env;`	253	`const char *env;`
254	`#ifdef _WINSOCKAPI_`	254	`#ifdef _WINSOCKAPI_`
255	`WSADATA wsaData;`	255	`WSADATA wsaData;`
256	`#endif`	256	`#endif`
257		257
258	`if (initialized)`	258	`if (initialized)`
259	`return;`	259	`return;`
260		260
261	`#ifdef _WINSOCKAPI_`	261	`#ifdef _WINSOCKAPI_`
262	`if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)`	262	`if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)`
263	`return;`	263	`return;`
264	`#endif`	264	`#endif`
265		265
266	`if (proxy == NULL) {`	266	`if (proxy == NULL) {`
267	`proxyPort = 80;`	267	`proxyPort = 80;`
268	`env = getenv("no_proxy");`	268	`env = getenv("no_proxy");`
269	`if (env && ((env[0] == '*') && (env[1] == 0)))`	269	`if (env && ((env[0] == '*') && (env[1] == 0)))`
270	`goto done;`	270	`goto done;`
271	`env = getenv("http_proxy");`	271	`env = getenv("http_proxy");`
272	`if (env != NULL) {`	272	`if (env != NULL) {`
273	`RxmlNanoHTTPScanProxy(env);`	273	`RxmlNanoHTTPScanProxy(env);`
274	`goto chkuser;`	274	`goto chkuser;`
275	`}`	275	`}`
276	`env = getenv("HTTP_PROXY");`	276	`env = getenv("HTTP_PROXY");`
277	`if (env != NULL) {`	277	`if (env != NULL) {`
278	`RxmlNanoHTTPScanProxy(env);`	278	`RxmlNanoHTTPScanProxy(env);`
279	`goto chkuser;`	279	`goto chkuser;`
280	`}`	280	`}`
281	`chkuser:`	281	`chkuser:`
282	`if((env = getenv("http_proxy_user")) != NULL) {`	282	`if((env = getenv("http_proxy_user")) != NULL) {`
283	`if (proxyUser != NULL) {xmlFree(proxyUser); proxyUser = NULL;}`	283	`if (proxyUser != NULL) {xmlFree(proxyUser); proxyUser = NULL;}`
284	`#ifdef Win32`	284	`#ifdef Win32`
285	`if (strcmp(env, "ask") == 0)`	285	`if (strcmp(env, "ask") == 0)`
286	`env = askUserPass("Proxy Authentication");`	286	`env = askUserPass("Proxy Authentication");`
287	`#endif`	287	`#endif`
288	`proxyUser = xmlMemStrdup(env);`	288	`proxyUser = xmlMemStrdup(env);`
289	`}`	289	`}`
290	`}`	290	`}`
291	`done:`	291	`done:`
292	`initialized = 1;`	292	`initialized = 1;`
293	`}`	293	`}`
294		294
295	`/**`	295	`/**`
296	`* RxmlNanoHTTPClenup:`	296	`* RxmlNanoHTTPClenup:`
297	`*`	297	`*`
298	`* Cleanup the HTTP protocol layer.`	298	`* Cleanup the HTTP protocol layer.`
299	`*/`	299	`*/`
300		300
301	`void`	301	`void`
302	`RxmlNanoHTTPCleanup(void)`	302	`RxmlNanoHTTPCleanup(void)`
303	`{`	303	`{`
304	`if (proxy != NULL) xmlFree(proxy);`	304	`if (proxy != NULL) xmlFree(proxy);`
305	`if (proxyUser != NULL) xmlFree(proxyUser);`	305	`if (proxyUser != NULL) xmlFree(proxyUser);`
306	`#ifdef _WINSOCKAPI_`	306	`#ifdef _WINSOCKAPI_`
307	`if (initialized)`	307	`if (initialized)`
308	`WSACleanup();`	308	`WSACleanup();`
309	`#endif`	309	`#endif`
310	`initialized = 0;`	310	`initialized = 0;`
311	`return;`	311	`return;`
312	`}`	312	`}`
313		313
314	`/**`	314	`/**`
315	`* RxmlNanoHTTPTimeout:`	315	`* RxmlNanoHTTPTimeout:`
316	`* @delay: the delay in seconds`	316	`* @delay: the delay in seconds`
317	`*`	317	`*`
318	`* Set the HTTP timeout, (default is 60secs). 0 means immediate`	318	`* Set the HTTP timeout, (default is 60secs). 0 means immediate`
319	`* return, while -1 infinite.`	319	`* return, while -1 infinite.`
320	`*/`	320	`*/`
321		321
322	`void`	322	`void`
323	`RxmlNanoHTTPTimeout(int delay)`	323	`RxmlNanoHTTPTimeout(int delay)`
324	`{`	324	`{`
325	`timeout = (unsigned int) delay;`	325	`timeout = (unsigned int) delay;`
326	`}`	326	`}`
327		327
328	`/**`	328	`/**`
329	`* RxmlNanoHTTPScanURL:`	329	`* RxmlNanoHTTPScanURL:`
330	`* @ctxt: an HTTP context`	330	`* @ctxt: an HTTP context`
331	`* @URL: The URL used to initialize the context`	331	`* @URL: The URL used to initialize the context`
332	`*`	332	`*`
333	`* (Re)Initialize an HTTP context by parsing the URL and finding`	333	`* (Re)Initialize an HTTP context by parsing the URL and finding`
334	`* the protocol host port and path it indicates.`	334	`* the protocol host port and path it indicates.`
335	`*/`	335	`*/`
336		336
337	`/* GET URLs can be very long, so use more generous limit here */`	337	`/* GET URLs can be very long, so use more generous limit here */`
338		338
339	`static void`	339	`static void`
340	`RxmlNanoHTTPScanURL(RxmlNanoHTTPCtxtPtr ctxt, const char *URL)`	340	`RxmlNanoHTTPScanURL(RxmlNanoHTTPCtxtPtr ctxt, const char *URL)`
341	`{`	341	`{`
342	`const char *cur = URL;`	342	`const char *cur = URL;`
343	`char buf[40960];`	343	`char buf[40960];`
344	`int indx = 0;`	344	`int indx = 0;`
345	`int port = 0;`	345	`int port = 0;`
346		346
347	`if (ctxt->protocol != NULL) {`	347	`if (ctxt->protocol != NULL) {`
348	`xmlFree(ctxt->protocol);`	348	`xmlFree(ctxt->protocol);`
349	`ctxt->protocol = NULL;`	349	`ctxt->protocol = NULL;`
350	`}`	350	`}`
351	`if (ctxt->hostname != NULL) {`	351	`if (ctxt->hostname != NULL) {`
352	`xmlFree(ctxt->hostname);`	352	`xmlFree(ctxt->hostname);`
353	`ctxt->hostname = NULL;`	353	`ctxt->hostname = NULL;`
354	`}`	354	`}`
355	`if (ctxt->path != NULL) {`	355	`if (ctxt->path != NULL) {`
356	`xmlFree(ctxt->path);`	356	`xmlFree(ctxt->path);`
357	`ctxt->path = NULL;`	357	`ctxt->path = NULL;`
358	`}`	358	`}`
359	`if (URL == NULL) return;`	359	`if (URL == NULL) return;`
360	`buf[indx] = 0;`	360	`buf[indx] = 0;`
361	`while (*cur != 0) {`	361	`while (*cur != 0) {`
362	`if ((cur[0] == ':') && (cur[1] == '/') && (cur[2] == '/')) {`	362	`if ((cur[0] == ':') && (cur[1] == '/') && (cur[2] == '/')) {`
363	`buf[indx] = 0;`	363	`buf[indx] = 0;`
364	`ctxt->protocol = xmlMemStrdup(buf);`	364	`ctxt->protocol = xmlMemStrdup(buf);`
365	`indx = 0;`	365	`indx = 0;`
366	`cur += 3;`	366	`cur += 3;`
367	`break;`	367	`break;`
368	`}`	368	`}`
369	`if(indx >= 40959)`	369	`if(indx >= 40959)`
370	`RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL")); buf[indx++] = *cur++;`	370	`RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL")); buf[indx++] = *cur++;`
371	`}`	371	`}`
372	`if (*cur == 0) return;`	372	`if (*cur == 0) return;`
373		373
374	`buf[indx] = 0;`	374	`buf[indx] = 0;`
375	`while (1) {`	375	`while (1) {`
376	`if (cur[0] == ':') {`	376	`if (cur[0] == ':') {`
377	`buf[indx] = 0;`	377	`buf[indx] = 0;`
378	`ctxt->hostname = xmlMemStrdup(buf);`	378	`ctxt->hostname = xmlMemStrdup(buf);`
379	`indx = 0;`	379	`indx = 0;`
380	`cur += 1;`	380	`cur += 1;`
381	`while ((cur >= '0') && (cur <= '9')) {`	381	`while ((cur >= '0') && (cur <= '9')) {`
382	`port *= 10;`	382	`port *= 10;`
383	`port += *cur - '0';`	383	`port += *cur - '0';`
384	`cur++;`	384	`cur++;`
385	`}`	385	`}`
386	`if (port != 0) ctxt->port = port;`	386	`if (port != 0) ctxt->port = port;`
387	`while ((cur[0] != '/') && (*cur != 0))`	387	`while ((cur[0] != '/') && (*cur != 0))`
388	`cur++;`	388	`cur++;`
389	`break;`	389	`break;`
390	`}`	390	`}`
391	`if ((cur == '/') \|\| (cur == 0)) {`	391	`if ((cur == '/') \|\| (cur == 0)) {`
392	`buf[indx] = 0;`	392	`buf[indx] = 0;`
393	`ctxt->hostname = xmlMemStrdup(buf);`	393	`ctxt->hostname = xmlMemStrdup(buf);`
394	`indx = 0;`	394	`indx = 0;`
395	`break;`	395	`break;`
396	`}`	396	`}`
397	`if(indx >= 40959)`	397	`if(indx >= 40959)`
398	`RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL")); buf[indx++] = *cur++;`	398	`RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL")); buf[indx++] = *cur++;`
399	`}`	399	`}`
400	`if (*cur == 0)`	400	`if (*cur == 0)`
401	`ctxt->path = xmlMemStrdup("/");`	401	`ctxt->path = xmlMemStrdup("/");`
402	`else {`	402	`else {`
403	`indx = 0;`	403	`indx = 0;`
404	`buf[indx] = 0;`	404	`buf[indx] = 0;`
405	`while (*cur != 0) {`	405	`while (*cur != 0) {`
406	`if(indx >= 40959)`	406	`if(indx >= 40959)`
407	`RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL"));`	407	`RxmlMessage(2, _("RxmlNanoHTTPScanURL: overlong (invalid?) URL"));`
408	`buf[indx++] = *cur++;`	408	`buf[indx++] = *cur++;`
409	`}`	409	`}`
410	`buf[indx] = 0;`	410	`buf[indx] = 0;`
411	`ctxt->path = xmlMemStrdup(buf);`	411	`ctxt->path = xmlMemStrdup(buf);`
412	`}`	412	`}`
413	`}`	413	`}`
414		414
415	`/**`	415	`/**`
416	`* RxmlNanoHTTPScanProxy:`	416	`* RxmlNanoHTTPScanProxy:`
417	`* @URL: The proxy URL used to initialize the proxy context`	417	`* @URL: The proxy URL used to initialize the proxy context`
418	`*`	418	`*`
419	`* (Re)Initialize the HTTP Proxy context by parsing the URL and finding`	419	`* (Re)Initialize the HTTP Proxy context by parsing the URL and finding`
420	`* the protocol host port it indicates.`	420	`* the protocol host port it indicates.`
421	`* Should be like http://myproxy/ or http://myproxy:3128/`	421	`* Should be like http://myproxy/ or http://myproxy:3128/`
422	`* A NULL URL cleans up proxy informations.`	422	`* A NULL URL cleans up proxy informations.`
423	`*/`	423	`*/`
424		424
425	`void`	425	`void`
426	`RxmlNanoHTTPScanProxy(const char *URL)`	426	`RxmlNanoHTTPScanProxy(const char *URL)`
427	`{`	427	`{`
428	`const char *cur = URL;`	428	`const char *cur = URL;`
429	`char buf[4096];`	429	`char buf[4096];`
430	`int indx = 0;`	430	`int indx = 0;`
431	`int port = 0;`	431	`int port = 0;`
432		432
433	`if (proxy != NULL) {`	433	`if (proxy != NULL) {`
434	`xmlFree(proxy);`	434	`xmlFree(proxy);`
435	`proxy = NULL;`	435	`proxy = NULL;`
436	`}`	436	`}`
437	`/*if (proxyPort != 0) {`	437	`/*if (proxyPort != 0) {`
438	`proxyPort = 0;`	438	`proxyPort = 0;`
439	`}*/`	439	`}*/`
440	`if (URL == NULL)`	440	`if (URL == NULL)`
441	`RxmlMessage(0, _("removing HTTP proxy info"));`	441	`RxmlMessage(0, _("removing HTTP proxy info"));`
442	`else`	442	`else`
443	`RxmlMessage(1, _("using HTTP proxy '%s'"), URL);`	443	`RxmlMessage(1, _("using HTTP proxy '%s'"), URL);`
444	`if (URL == NULL) return;`	444	`if (URL == NULL) return;`
445	`buf[indx] = 0;`	445	`buf[indx] = 0;`
446	`while (*cur != 0) {`	446	`while (*cur != 0) {`
447	`if ((cur[0] == ':') && (cur[1] == '/') && (cur[2] == '/')) {`	447	`if ((cur[0] == ':') && (cur[1] == '/') && (cur[2] == '/')) {`
448	`buf[indx] = 0;`	448	`buf[indx] = 0;`
449	`indx = 0;`	449	`indx = 0;`
450	`cur += 3;`	450	`cur += 3;`
451	`break;`	451	`break;`
452	`}`	452	`}`
453	`if(indx >= 4095)`	453	`if(indx >= 4095)`
454	`RxmlMessage(2, _("RxmlNanoHTTPScanProxy: overlong (invalid?) URL"));`	454	`RxmlMessage(2, _("RxmlNanoHTTPScanProxy: overlong (invalid?) URL"));`
455	`buf[indx++] = *cur++;`	455	`buf[indx++] = *cur++;`
456	`}`	456	`}`
457	`if (*cur == 0) return;`	457	`if (*cur == 0) return;`
458		458
459	`if(strchr(cur, '@')) {`	459	`if(strchr(cur, '@')) {`
460	`strcpy(buf, cur);`	460	`strcpy(buf, cur);`
461	`*(strchr(buf, '@')) = '\0';`	461	`*(strchr(buf, '@')) = '\0';`
462	`if(proxyUser) xmlFree(proxyUser);`	462	`if(proxyUser) xmlFree(proxyUser);`
463	`proxyUser = xmlMemStrdup(buf);`	463	`proxyUser = xmlMemStrdup(buf);`
464	`cur += (int)strlen(buf) + 1;`	464	`cur += (int)strlen(buf) + 1;`
465	`}`	465	`}`
466	`buf[indx] = 0;`	466	`buf[indx] = 0;`
467	`while (1) {`	467	`while (1) {`
468	`if (cur[0] == ':') {`	468	`if (cur[0] == ':') {`
469	`buf[indx] = 0;`	469	`buf[indx] = 0;`
470	`proxy = xmlMemStrdup(buf);`	470	`proxy = xmlMemStrdup(buf);`
471	`indx = 0;`	471	`indx = 0;`
472	`cur += 1;`	472	`cur += 1;`
473	`while ((cur >= '0') && (cur <= '9')) {`	473	`while ((cur >= '0') && (cur <= '9')) {`
474	`port *= 10;`	474	`port *= 10;`
475	`port += *cur - '0';`	475	`port += *cur - '0';`
476	`cur++;`	476	`cur++;`
477	`}`	477	`}`
478	`if (port != 0) proxyPort = port;`	478	`if (port != 0) proxyPort = port;`
479	`while ((cur[0] != '/') && (*cur != 0))`	479	`while ((cur[0] != '/') && (*cur != 0))`
480	`cur++;`	480	`cur++;`
481	`break;`	481	`break;`
482	`}`	482	`}`
483	`if ((cur == '/') \|\| (cur == 0)) {`	483	`if ((cur == '/') \|\| (cur == 0)) {`
484	`buf[indx] = 0;`	484	`buf[indx] = 0;`
485	`proxy = xmlMemStrdup(buf);`	485	`proxy = xmlMemStrdup(buf);`
486	`indx = 0;`	486	`indx = 0;`
487	`break;`	487	`break;`
488	`}`	488	`}`
489	`if(indx >= 4095)`	489	`if(indx >= 4095)`
490	`RxmlMessage(2, _("RxmlNanoHTTPScanProxy: overlong (invalid?) URL")); buf[indx++] = *cur++;`	490	`RxmlMessage(2, _("RxmlNanoHTTPScanProxy: overlong (invalid?) URL")); buf[indx++] = *cur++;`
491	`}`	491	`}`
492	`}`	492	`}`
493		493
494	`/**`	494	`/**`
495	`* RxmlNanoHTTPNewCtxt:`	495	`* RxmlNanoHTTPNewCtxt:`
496	`* @URL: The URL used to initialize the context`	496	`* @URL: The URL used to initialize the context`
497	`*`	497	`*`
498	`* Allocate and initialize a new HTTP context.`	498	`* Allocate and initialize a new HTTP context.`
499	`*`	499	`*`
500	`* Returns an HTTP context or NULL in case of error.`	500	`* Returns an HTTP context or NULL in case of error.`

The R Project SVN R

(root)/trunk/src/modules/internet/nanohttp.c @ 63243 – Rev 61850 → 62559