Content - Type:multipart / form - data; boundary = ----XXXX-YYYY-ZZZZ-$$$$

最新推荐文章于 2025-07-02 14:37:11 发布

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最新推荐文章于 2025-07-02 14:37:11 发布

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本文链接：https://blog.youkuaiyun.com/durongze/article/details/86533085

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本文介绍了一个使用C++进行并发文件流操作，并构建HTTP POST请求的示例，详细展示了如何设置请求头，包括边界字符串、内容类型以及如何处理文件流。此过程涉及到的关键词包括：C++, 并发, HTTP POST, 流操作, 请求头构造。

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    http_response response;
   http::uri_builder url(U("1?name=dyz"));
   concurrency::streams::fstream::open_istream(file, std::ios::in).then([&](concurrency::streams::istream isfile)
   {
       std::string boundary = ("----XXXX-YYYY-ZZZZ-$$$$");
       std::string first_boundary = ("--") + boundary + ("\r\n");
       std::string next_boundary = ("\r\n--") + boundary + ("\r\n");
       std::string last_boundary = ("\r\n--") + boundary + ("--") + ("\r\n");
       std::string data_header = ("Content-Disposition: form-data; name=\"data\"\r\n\r\n");
       std::string data_body = ("{\"name\":\"duyongze\"}");
       std::string file_header = ("Content-Disposition: form-data; name=\"file\"; filename=\"duyongze.shp\"\r\n");
       std::string file_type = ("Content-Type: application/octet-stream\r\n\r\n");
       std::string file_body = ("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
       std::string data = first_boundary + data_header + data_body + next_boundary + file_header + file_type + file_body + last_boundary;
       concurrency::streams::container_buffer<std::string> rbuf(data);
       concurrency::streams::istream isdata(rbuf);
       concurrency::streams::streambuf<uint8_t> shpFileBuf = isfile.streambuf();
       response = cli.request(methods::POST, url.to_string(), isdata, U("multipart/form-data; boundary=----XXXX-YYYY-ZZZZ-$$$$")).get();
       BJPutResponse answer = BJPutResponse::FromJSON(response.extract_json().get());
       refresh = answer.Status == ST_Refresh;
   }).then([](pplx::task<void> t)
   {
       try
       {
           t.get();
       }
       catch (...)
       {
        }
   });