xref: /curl/docs/examples/httpput-postfields.c (revision f81f351b)
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8  * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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21  * SPDX-License-Identifier: curl
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24 /* <DESC>
25  * HTTP PUT using CURLOPT_POSTFIELDS
26  * </DESC>
27  */
28 #include <stdio.h>
29 #include <fcntl.h>
30 #include <sys/stat.h>
31 #include <curl/curl.h>
32 
33 static const char olivertwist[]=
34   "Among other public buildings in a certain town, which for many reasons "
35   "it will be prudent to refrain from mentioning, and to which I will assign "
36   "no fictitious name, there is one anciently common to most towns, great or "
37   "small: to wit, a workhouse; and in this workhouse was born; on a day and "
38   "date which I need not trouble myself to repeat, inasmuch as it can be of "
39   "no possible consequence to the reader, in this stage of the business at "
40   "all events; the item of mortality whose name is prefixed";
41 
42 /* ... to the head of this chapter. String cut off to stick within the C90
43    509 byte limit. */
44 
45 /*
46  * This example shows an HTTP PUT operation that sends a fixed buffer with
47  * CURLOPT_POSTFIELDS to the URL given as an argument.
48  */
49 
main(int argc,char ** argv)50 int main(int argc, char **argv)
51 {
52   CURL *curl;
53   CURLcode res;
54   char *url;
55 
56   if(argc < 2)
57     return 1;
58 
59   url = argv[1];
60 
61   /* In Windows, this inits the Winsock stuff */
62   curl_global_init(CURL_GLOBAL_ALL);
63 
64   /* get a curl handle */
65   curl = curl_easy_init();
66   if(curl) {
67     struct curl_slist *headers = NULL;
68 
69     /* default type with postfields is application/x-www-form-urlencoded,
70        change it if you want */
71     headers = curl_slist_append(headers, "Content-Type: literature/classic");
72     curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
73 
74     /* pass on content in request body. When CURLOPT_POSTFIELDSIZE is not used,
75        curl does strlen to get the size. */
76     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, olivertwist);
77 
78     /* override the POST implied by CURLOPT_POSTFIELDS
79      *
80      * Warning: CURLOPT_CUSTOMREQUEST is problematic, especially if you want
81      * to follow redirects. Be aware.
82      */
83     curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "PUT");
84 
85     /* specify target URL, and note that this URL should include a file
86        name, not only a directory */
87     curl_easy_setopt(curl, CURLOPT_URL, url);
88 
89     /* Now run off and do what you have been told! */
90     res = curl_easy_perform(curl);
91     /* Check for errors */
92     if(res != CURLE_OK)
93       fprintf(stderr, "curl_easy_perform() failed: %s\n",
94               curl_easy_strerror(res));
95 
96     /* always cleanup */
97     curl_easy_cleanup(curl);
98 
99     /* free headers */
100     curl_slist_free_all(headers);
101   }
102 
103   curl_global_cleanup();
104   return 0;
105 }
106