我使用这个选项：
curl_easy_setopt(curl, CURLOPT_URL, urlUpload);
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errorBuffer);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, body.c_str());
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, header);
必须是带 header 的 post 请求。在标头变量中有长度
***
char sizeStr[50];
sprintf(sizeStr, "Content-Length: %d", body.length());
***
header = curl_slist_append(header, sizeStr);
***
我想做的是将视频上传到 YouTube，我正在使用他们的手册 http://code.google.com/apis/youtube/2.0/developers_guide_protocol_direct_uploading.html#Direct_uploading
我收到这样的错误。
<!DOCTYPE html>
<html lang=en>
<meta charset=utf-8>
<title>Error 411 (Length Required)!!1</title>
<style>
*many symbols here*
</style>
<a href=//www.google.com/ id=g><img src=//www.google.com/images/logo_sm.gif alt=Google></a>
<p><b>411.</b> <ins>Thatв€™s an error.</ins>
<p>POST requests require a <code>Content-length</code> header. <ins>Thatв€™s all we know.</ins>
也许我必须使用其他一些 CURL 选项？
UPDATE:当我设置
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
我也收到
* About to connect() to uploads.gdata.youtube.com port 80 (#0)
* Trying 74.125.XX.XXX... * connected
* Connected to uploads.gdata.youtube.com (74.125.XX.XXX) port 80 (#0)
> POST /feeds/api/users/default/uploads HTTP/1.1
Accept: */*
Host: uploads.gdata.youtube.com
Authorization: GoogleLogin auth=DQAAAIkAAACTK9tZPCTY1XQvXGkg4qkaIuZ1QO-Bh6- ZyzOHuigFNC_gR4Piep4NljAjdOP4s-k7vqj-j4LdckXM9jxzlElgtaxr- CShI1vIWkjm5ZtFsj3a9v1YqFmjIkEi3NCP2ON18D9jmXSIarPqprWiOK0n3oxznCBhm4osXwJ1yRstVVM5bG5mOlC331eMCrOKp3E
GData-Version: 2
X-GData-Key: key=AI39si59VMkm6DATDmfG_Df6D23jfto3xRVfbAEMrFBv035pdRZ5AYMPsRXbGLCRXXnK5jz6KCSWSkuXOTrlDIIKWy7Le9fkQQ
Slug: screen.avi
Content-Type: multipart/related; boundary="d31fcjR2"
Content-length: 910273
Connection: close
* HTTP 1.0, assume close after body
< HTTP/1.0 411 Length Required
< Content-Type: text/html; charset=UTF-8
< Content-Length: 11791
< Date: Fri, 02 Sep 2011 16:09:58 GMT
< Server: GFE/2.0
<
* Closing connection #0
