On 3/7/2016 1:15 AM, Waitman Gobble wrote:
> When I set Content-Type header to multipart/form-data and add data to
> CURLOPT_POSTFIELDS it seems to hang. I thought maybe proxy issue but
> tried with/without.
> 1) If sending simple string like a=foo&j=boo then there isn't an issue
> 2) If I don't set Content-Length then it doesn't hang, makes the post.
> However receiving side doesn't get data (content length 172 but should
> be 134610
>
> Thanks for any help or pointers.
>
>
> system,
>
> FreeBSD ob4.cloudqx.com 10.2-RELEASE-p9 FreeBSD 10.2-RELEASE-p9 #0:
>
> curl-7.47.0 from ports
>
>
> #include <iostream>
> #include <fstream>
> #include <string>
> #include <curl/curl.h>
>
> using namespace std;
>
> int main(void) {
>
> CURL *conn = NULL;
> curl_global_init(CURL_GLOBAL_DEFAULT);
>
> conn = curl_easy_init();
> static char errorBuffer[CURL_ERROR_SIZE];
>
> curl_easy_setopt(conn, CURLOPT_ERRORBUFFER, errorBuffer);
> //curl_easy_setopt(conn, CURLOPT_URL, "http://wp.amodaco.com/filepost.php");
> curl_easy_setopt(conn, CURLOPT_HEADER, 1L);
> //curl_easy_setopt(conn, CURLOPT_PROXY, "http://127.0.0.1");
> //curl_easy_setopt(conn, CURLOPT_PROXYPORT, 3128);
>
> curl_easy_setopt(conn, CURLOPT_URL, "https://hub.zilla.tech/filepost.php");
>
> char* post_string;
> int post_size;
> ifstream file;
> file.open("/c/nginx/0/11/0000000110",ios_base::binary);
> //file.open("/c/nginx/7/10/0000000107",ios_base::binary);
> file.seekg(0,ios::end);
> post_size = file.tellg();
> file.seekg(0,ios::beg);
> post_string = new char[post_size];
> file.read(post_string,post_size);
> file.close();
>
> struct curl_slist *chunk = NULL;
> chunk = curl_slist_append(chunk, "Content-Type: multipart/form-data;
> boundary=-----------------------------84927149120355803091994092429");
> std::string cl = "Content-Length: " + std::to_string(post_size);
> chunk = curl_slist_append(chunk, cl.c_str());
> curl_easy_setopt(conn, CURLOPT_POSTFIELDS, post_string);
> curl_easy_setopt(conn, CURLOPT_HTTPHEADER, chunk);
> cout << "before perform\r\n";
> curl_easy_perform(conn);
> curl_easy_cleanup(conn);
> cout << "finis\r\n";
> cout << cl << "\r\n";
>
> return(0);
> }
>

Don't set those headers and if you want to do multipart don't use
CURLOPT_POSTFIELDS, use CURLOPT_HTTPPOST [1] instead. Look at the
EXAMPLE section it probably does what you need. Also review curl_formadd
[2], If you have a particularly large file you'll need to use
CURLFORM_STREAM and CURLOPT_READFUNCTION instead of loading the entire
thing in memory.

struct curl_httppost *formpost = NULL;
struct curl_httppost *lastptr = NULL;

<curl_formadd calls>

curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);

As an aside, if you don't want multipart and you use CURLOPT_POSTFIELDS
and pass it binary data set the size using CURLOPT_POSTFIELDSIZE [3] or
CURLOPT_POSTFIELDSIZE_LARGE [4] and make sure you use exactly the type
specified, for example:

curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long)post_size);
or
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE_LARGE, (curl_off_t)post_size);

[1]: https://curl.haxx.se/libcurl/c/CURLOPT_HTTPPOST.html
[2]: https://curl.haxx.se/libcurl/c/curl_formadd.html
[3]: https://curl.haxx.se/libcurl/c/CURLOPT_POSTFIELDSIZE.html
[4]: https://curl.haxx.se/libcurl/c/CURLOPT_POSTFIELDSIZE_LARGE.html

-------------------------------------------------------------------
List admin: https://cool.haxx.se/list/listinfo/curl-library
Etiquette: https://curl.haxx.se/mail/etiquette.html
Received on 2016-03-07