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(Unicode C) HTTPS multipart/form-data POSTDemonstrates how to send a multipart/form-data POST over HTTPS (using TLS).
#include <C_CkHttpRequestW.h> #include <C_CkHttpW.h> #include <C_CkHttpResponseW.h> void ChilkatSample(void) { HCkHttpRequestW req; const wchar_t *pathToFileOnDisk; BOOL success; const wchar_t *fileContents; HCkHttpW http; HCkHttpResponseW resp; const wchar_t *htmlStr; // This example assumes the Chilkat HTTP API to have been previously unlocked. // See Global Unlock Sample for sample code. // This example demonstrates how to send a multipart/form-data POST that // looks like this: // POST /cgi/XXX.pl HTTP/1.0 // Accept: text/html // Connection: Keep-Alive // User-Agent: XXX/8.0.15 // Content-type: multipart/form-data, boundary=XXXxyxy // Content-Length: 682 // // --XXXxyxy // content-disposition: form-data; name="UploadAgent" // // InterfaceVersion1.5 // --XXXxyxy // content-disposition: form-data; name="user" // // userValue // --XXXxyxy // content-disposition: form-data; name="password" // // passwordValue // --XXXxyxy // content-disposition: form-data; name="file" // // fileValue // --XXXxyxy // content-disposition: form-data; name="data_version" // // dataVersion // --XXXxyxy // content-disposition: form-data; name="content2"; filename="XXX" // // THE FILE CONTENT GOES HERE... // --XXXxyxy-- // // First, let's build the HTTP request object req = CkHttpRequestW_Create(); CkHttpRequestW_putHttpVerb(req,L"POST"); CkHttpRequestW_putPath(req,L"/cgi/XXX.pl"); // The boundary string is automatically generated and added by Chilkat. // The value for the boundary string doesn't matter. (As long as it's a unique string that doesn't occur elsewhere in the request.) CkHttpRequestW_putContentType(req,L"multipart/form-data"); // Adding the Connection: Keep-Alive is optional. It only makes sense if the intent is to send // additional requests to the same domain (your-namespace-sb.accesscontrol.windows.net) within a reasonable time period. CkHttpRequestW_AddHeader(req,L"Connection",L"Keep-Alive"); // -------------------------------------------------- // IMPORTANT: Never set the Content-Length header. // Chilkat will automatically compute the correct Content-Length and will add it. // -------------------------------------------------- // If a specific User-Agent header field is needed, it can be added by calling AddHeader. CkHttpRequestW_AddHeader(req,L"User-Agent",L"XXX/8.0.15"); // The "Accept" header, if present, tells the server what Content-Type responses will be accepted. // In this case, we're telling the server that we'll only accept "text/html" responses, and therefore // the server SHOULD only send a text/html response. Technically, the Accept header is not required. CkHttpRequestW_AddHeader(req,L"Accept",L"text/html"); // Add the params to the request. Given that the Content-Type is set to "multipart/form-data", when // Chilkat composes the request, it will put each param in it's own MIME sub-part (i.e. in it's own // part delimited by the boundary string). CkHttpRequestW_AddParam(req,L"UploadAgent",L"InterfaceVersion1.5"); CkHttpRequestW_AddParam(req,L"user",L"userValue"); CkHttpRequestW_AddParam(req,L"password",L"passwordValue"); CkHttpRequestW_AddParam(req,L"file",L"fileValue"); CkHttpRequestW_AddParam(req,L"data_version",L"dataVersion"); // The last param is the contents of a file. // If it's a file on disk, we can add it like this: pathToFileOnDisk = L"c:/someDir/someFile.dat"; success = CkHttpRequestW_AddFileForUpload(req,L"content2",pathToFileOnDisk); if (success != TRUE) { wprintf(L"%s\n",CkHttpRequestW_lastErrorText(req)); CkHttpRequestW_Dispose(req); return; } // Alternatively, if the contents of the file are in memory, perhaps in a string // variable, the file can be added like this instead. fileContents = L"This is the content of the file being uploaded."; success = CkHttpRequestW_AddStringForUpload(req,L"content2",L"XXX",fileContents,L"utf-8"); // ----------------------------------------------------------- // IMPORTANT: To duplicate the HTTP request shown above, you'll want to choose // either AddStringForUpload or AddFileForUpload, but not both. It's possible to upload // any number of files by calling AddStringForUpload and/or AddFileForUpload any number // of times, once per file to be uploaded. This of course assumes that the receiving // end is programmed to receive multiple files.. // ------------------------------------------------------------ http = CkHttpW_Create(); // The request is ready... now send it using HTTPS (which is port 443 by default). resp = CkHttpW_SynchronousRequest(http,L"www.myserver.com",443,TRUE,req); if (CkHttpW_getLastMethodSuccess(http) != TRUE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); CkHttpRequestW_Dispose(req); CkHttpW_Dispose(http); return; } wprintf(L"HTTP response status: %d\n",CkHttpResponseW_getStatusCode(resp)); // In this case, the response would be HTML because our Accept header // told the server to only return HTML. The HTML is available on the BodyStr // property of the response object: htmlStr = CkHttpResponseW_bodyStr(resp); wprintf(L"Received:\n"); wprintf(L"%s\n",htmlStr); CkHttpResponseW_Dispose(resp); CkHttpRequestW_Dispose(req); CkHttpW_Dispose(http); } |
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