1

我正在尝试使用 libcurl 将 C/C++ 代码上传到 S3。我正在上传要从回调生成的二进制数据。

我已经盯着这个看了一段时间，所以我可能离题了:(但这是我的代码现在的样子：

首先，我像这样构建我的表单：

struct curl_httppost *buildForm(void *streamData, long contentLength) {
   struct curl_httppost *formpost=NULL;
   struct curl_httppost *lastptr=NULL;
   for( int i=0; i<form.size(); ++i ) {
     curl_formadd(&formpost,
           &lastptr,
           CURLFORM_COPYNAME, form[i].first.c_str(),
           CURLFORM_COPYCONTENTS, form[i].second.c_str(),
           CURLFORM_END);
  }
  curl_formadd(&formpost,
           &lastptr,
           CURLFORM_COPYNAME, "file",
           CURLFORM_STREAM, streamData,
           CURLFORM_CONTENTSLENGTH, (long) contentLength,
           CURLFORM_FILENAME, "chunk",
           //CURLFORM_CONTENTTYPE, "application/octet-stream",
           CURLFORM_END);
  return formpost;
}

然后我像这样设置请求：

  curl_easy_reset( handle );
  struct curl_slist *headers = NULL;
  headers = curl_slist_append(headers, "Expect:");
  curl_easy_setopt( handle, CURLOPT_HTTPHEADER, headers);
  curl_easy_setopt( handle, CURLOPT_VERBOSE, 1L );
  curl_easy_setopt( handle, CURLOPT_DEBUGFUNCTION, curlDebugger );
  curl_easy_setopt( handle, CURLOPT_URL, postInstructions.url.c_str() );
  curl_easy_setopt( handle, CURLOPT_POST, 1L);

  // set the data and header read callbacks:
  curl_easy_setopt( handle, CURLOPT_READFUNCTION, &(UploadCallback::writeDataStatic));
  curl_easy_setopt( handle, CURLOPT_HTTPPOST, formpost);
  //I have tried with and without this line
  curl_easy_setopt( handle, CURLOPT_POSTFIELDSIZE_LARGE, (curl_off_t)contentLength);
  curl_easy_setopt( handle, CURLOPT_WRITEFUNCTION, &(XonamiResponse::readDataStatic));
  curl_easy_setopt( handle, CURLOPT_WRITEDATA, &response);
  curl_easy_setopt( handle, CURLOPT_HEADERFUNCTION, &(XonamiResponse::readHeaderStatic));
  curl_easy_setopt( handle, CURLOPT_WRITEHEADER, &response);

  // do it!
  int success = curl_easy_perform( handle );

然而，卷曲抱怨：

  operation aborted by callback

即使我生成的字节数与 contentLength 相同。当我将回调设置为只用零填充缓冲区时，只要请求数据，S3 就会响应：

  The body of your POST request is not well-formed multipart/form-data.

看着原始形式，我觉得最后一个（关闭）边界不见了。

curl --version 说：

curl 7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3 协议：tftp ftp telnet dict ldap http 文件 https ftps 功能：GSS-Negotiate IPv6 Largefile NTLM SSL libz

4

1 回答 1

1

看起来问题出在我的回调中，它在完成时无意中返回 abort 而不是 CURL_READFUNC_ABORT。哎呀。

于 2012-09-05T20:31:39.590 回答