R Under development (unstable) (2021-06-17 r80510) -- "Unsuffered Consequences"
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> ## These are tests that require a working Internet connection.
> ## We attempt to test for that.
>
> if(.Platform$OS.type == "unix" &&
+ is.null(nsl("cran.r-project.org"))) q()
>
> # test do_download (and "record" #{packages}):
> ap <- available.packages(contrib.url("http://cran.r-project.org"))
> ## IGNORE_RDIFF_BEGIN
> nrow(ap)
[1] 17721
> ## IGNORE_RDIFF_END
>
> # test url connections on http
> zz <- url("http://cran.r-project.org/")
> readLines(zz)
[1] ""
[2] ""
[3] ""
[4] "The Comprehensive R Archive Network"
[5] ""
[6] ""
[7] ""
[8] ""
[9] ""
[10] ""
[11] ""
> close(zz)
>
> # and via read.table
>
> read.table("http://www.stats.ox.ac.uk/pub/datasets/csb/ch11b.dat")
V1 V2 V3 V4 V5
1 1 307 930 36.58 0
2 2 307 940 36.73 0
3 3 307 950 36.93 0
4 4 307 1000 37.15 0
5 5 307 1010 37.23 0
6 6 307 1020 37.24 0
7 7 307 1030 37.24 0
8 8 307 1040 36.90 0
9 9 307 1050 36.95 0
10 10 307 1100 36.89 0
11 11 307 1110 36.95 0
12 12 307 1120 37.00 0
13 13 307 1130 36.90 0
14 14 307 1140 36.99 0
15 15 307 1150 36.99 0
16 16 307 1200 37.01 0
17 17 307 1210 37.04 0
18 18 307 1220 37.04 0
19 19 307 1230 37.14 0
20 20 307 1240 37.07 0
21 21 307 1250 36.98 0
22 22 307 1300 37.01 0
23 23 307 1310 36.97 0
24 24 307 1320 36.97 0
25 25 307 1330 37.12 0
26 26 307 1340 37.13 0
27 27 307 1350 37.14 0
28 28 307 1400 37.15 0
29 29 307 1410 37.17 0
30 30 307 1420 37.12 0
31 31 307 1430 37.12 0
32 32 307 1440 37.17 0
33 33 307 1450 37.28 0
34 34 307 1500 37.28 0
35 35 307 1510 37.44 0
36 36 307 1520 37.51 0
37 37 307 1530 37.64 0
38 38 307 1540 37.51 0
39 39 307 1550 37.98 1
40 40 307 1600 38.02 1
41 41 307 1610 38.00 1
42 42 307 1620 38.24 1
43 43 307 1630 38.10 1
44 44 307 1640 38.24 1
45 45 307 1650 38.11 1
46 46 307 1700 38.02 1
47 47 307 1710 38.11 1
48 48 307 1720 38.01 1
49 49 307 1730 37.91 1
50 50 307 1740 37.96 1
51 51 307 1750 38.03 1
52 52 307 1800 38.17 1
53 53 307 1810 38.19 1
54 54 307 1820 38.18 1
55 55 307 1830 38.15 1
56 56 307 1840 38.04 1
57 57 307 1850 37.96 1
58 58 307 1900 37.84 1
59 59 307 1910 37.83 1
60 60 307 1920 37.84 1
61 61 307 1930 37.74 1
62 62 307 1940 37.76 1
63 63 307 1950 37.76 1
64 64 307 2000 37.64 1
65 65 307 2010 37.63 1
66 66 307 2020 38.06 1
67 67 307 2030 38.19 1
68 68 307 2040 38.35 1
69 69 307 2050 38.25 1
70 70 307 2100 37.86 1
71 71 307 2110 37.95 1
72 72 307 2120 37.95 1
73 73 307 2130 37.76 1
74 74 307 2140 37.60 1
75 75 307 2150 37.89 1
76 76 307 2200 37.86 1
77 77 307 2210 37.71 1
78 78 307 2220 37.78 1
79 79 307 2230 37.82 1
80 80 307 2240 37.76 1
81 81 307 2250 37.81 1
82 82 307 2300 37.84 1
83 83 307 2310 38.01 1
84 84 307 2320 38.10 1
85 85 307 2330 38.15 1
86 86 307 2340 37.92 1
87 87 307 2350 37.64 1
88 88 308 0 37.70 1
89 89 308 10 37.46 1
90 90 308 20 37.41 1
91 91 308 30 37.46 1
92 92 308 40 37.56 1
93 93 308 50 37.55 1
94 94 308 100 37.75 1
95 95 308 110 37.76 1
96 96 308 120 37.73 1
97 97 308 130 37.77 1
98 98 308 140 38.01 1
99 99 308 150 38.04 1
100 100 308 200 38.07 1
>