libcurl-url(3)

1libcurl(3)                          libcurl                         libcurl(3)
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NAME

6       libcurl-url - URL interface overview
7

DESCRIPTION

9       The URL interface provides functions for parsing and generating URLs.
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INCLUDE

12       You still only include <curl/curl.h> in your code.
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CREATE

15       Create a handle that holds URL info and resources with curl_url(3):
16         CURLU *h = curl_url();
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CLEANUP

19       When done with it, clean it up with curl_url_cleanup(3)
20         curl_url_cleanup(h);
21

DUPLICATE

23       When   you   need   a   copy  of  a  handle,  just  duplicate  it  with
24       curl_url_dup(3):
25         CURLU *nh = curl_url_dup(h);
26

PARSING

28       By setting a URL to the handle with curl_url_set(3), the URL is  parsed
29       and  stored  in  the handle. If the URL is not syntactically correct it
30       will return an error instead.
31         rc = curl_url_set(h, CURLUPART_URL,
32                           "https://example.com:449/foo/bar?name=moo", 0);
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34       The zero in the fourth argument is a bitmask for changing specific fea‐
35       tures.
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37       If  successful,  this stores the URL in its individual parts within the
38       handle.
39

REDIRECT

41       When a handle already contains info about a URL, setting a relative URL
42       will make it "redirect" to adapt to it.
43         rc = curl_url_set(h, CURLUPART_URL, "../test?another", 0);
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GET URL

46       The  CURLU handle represents a URL and you can easily extract that with
47       curl_url_get(3):
48         char *url;
49         rc = curl_url_get(h, CURLUPART_URL, &url, 0);
50         curl_free(url);
51       The zero in the fourth argument is a bitmask for changing specific fea‐
52       tures.
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GET PARTS

55       When  a  URL  has  been  parsed or parts have been set, you can extract
56       those pieces from the handle at any time.
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58         rc = curl_url_get(h, CURLUPART_FRAGMENT, &fragment, 0);
59         rc = curl_url_get(h, CURLUPART_HOST, &host, 0);
60         rc = curl_url_get(h, CURLUPART_PASSWORD, &password, 0);
61         rc = curl_url_get(h, CURLUPART_PATH, &path, 0);
62         rc = curl_url_get(h, CURLUPART_PORT, &port, 0);
63         rc = curl_url_get(h, CURLUPART_QUERY, &query, 0);
64         rc = curl_url_get(h, CURLUPART_SCHEME, &scheme, 0);
65         rc = curl_url_get(h, CURLUPART_USER, &user, 0);
66         rc = curl_url_get(h, CURLUPART_ZONEID, &zoneid, 0);
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68       Extracted parts are not URL decoded unless the user also  asks  for  it
69       with the CURLU_URLDECODE flag set in the fourth bitmask argument.
70
71       Remember  to  free  the  returned string with curl_free(3) when you are
72       done with it!
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SET PARTS

75       A user set individual URL parts, either after having parsed a full  URL
76       or instead of parsing such.
77
78         rc = curl_url_set(urlp, CURLUPART_FRAGMENT, "anchor", 0);
79         rc = curl_url_set(urlp, CURLUPART_HOST, "www.example.com", 0);
80         rc = curl_url_set(urlp, CURLUPART_PASSWORD, "doe", 0);
81         rc = curl_url_set(urlp, CURLUPART_PATH, "/index.html", 0);
82         rc = curl_url_set(urlp, CURLUPART_PORT, "443", 0);
83         rc = curl_url_set(urlp, CURLUPART_QUERY, "name=john", 0);
84         rc = curl_url_set(urlp, CURLUPART_SCHEME, "https", 0);
85         rc = curl_url_set(urlp, CURLUPART_USER, "john", 0);
86         rc = curl_url_set(urlp, CURLUPART_ZONEID, "eth0", 0);
87
88       Set  parts  are  not  URL  encoded unless the user asks for it with the
89       CURLU_URLENCODE flag.
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CURLU_APPENDQUERY

92       An application can append a string to the right end of the  query  part
93       with the CURLU_APPENDQUERY flag to curl_url_set(3).
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95       Imagine  a handle that holds the URL "https://example.com/?shoes=2". An
96       application can then add the string "hat=1"  to  the  query  part  like
97       this:
98
99         rc = curl_url_set(urlp, CURLUPART_QUERY, "hat=1", CURLU_APPENDQUERY);
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101       It  will  even notice the lack of an ampersand (&) separator so it will
102       inject one too, and the handle's full URL will then equal  "https://ex‐
103       ample.com/?shoes=2&hat=1".
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105       The  appended  string can of course also get URL encoded on add, and if
106       asked to URL encode, the encoding process will skip the '='  character.
107       For example, append "candy=N&N" to what we already have, and URL encode
108       it to deal with the ampersand in the data:
109         rc = curl_url_set(urlp, CURLUPART_QUERY, "candy=N&N",
110                           CURLU_APPENDQUERY | CURLU_URLENCODE);
111
112       Now the URL looks like
113         https://example.com/?shoes=2&hat=1&candy=N%26N
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AVAILABILITY

116       The URL API was introduced in libcurl 7.62.0.
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118       A URL with a literal IPv6 address can be parsed even when IPv6  support
119       is not enabled.
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