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(Unicode C) HTTP multipart/form-data UploadDemonstrates how to upload files to an HTTP server using a multipart/form-data POST.
#include <C_CkHttpW.h> #include <C_CkHttpRequestW.h> #include <C_CkHttpResponseW.h> void ChilkatSample(void) { HCkHttpW http; HCkHttpRequestW req; BOOL success; HCkHttpResponseW resp; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. http = CkHttpW_Create(); req = CkHttpRequestW_Create(); CkHttpRequestW_putHttpVerb(req,L"POST"); CkHttpRequestW_putContentType(req,L"multipart/form-data"); CkHttpRequestW_putPath(req,L"rcvFormDataUpload.aspx"); // Send an "Expect: 100-continue" header in the request. // This causes the HTTP server to end a 100-continue response // immediately after receiving the HTTP header. The client // (Chilkat) will receive this intermediate response, and if // it's not an error response, it knows that the HTTP server will // accept the data that is forthcoming. // The alternative is to get an error response after trying to upload // the entire contents of the files. CkHttpRequestW_AddHeader(req,L"Expect",L"100-continue"); // Call AddFileForUpload2 for each file to be uploaded in the HTTP multipart/form-data POST // To allow Chilkat to determine the content-type automatically based on file-extension, // call AddFileForUpload instead. // The 1st arg is the filename passed in the HTTP request. // The 2nd arg is the path in the local filesytem. // The file is not loaded into memory. It is streamed directly from the file // when the HTTP POST is sent. success = CkHttpRequestW_AddFileForUpload2(req,L"starfish.jpg",L"c:/qa_data/starfish.jpg",L"image/jpg"); if (success != TRUE) { wprintf(L"%s\n",CkHttpRequestW_lastErrorText(req)); CkHttpW_Dispose(http); CkHttpRequestW_Dispose(req); return; } success = CkHttpRequestW_AddFileForUpload(req,L"something.pdf",L"c:/qa_data/something.pdf"); if (success != TRUE) { wprintf(L"%s\n",CkHttpRequestW_lastErrorText(req)); CkHttpW_Dispose(http); CkHttpRequestW_Dispose(req); return; } // Its also possible to add a file from a string: success = CkHttpRequestW_AddStringForUpload(req,L"test.xml",L"test.xml",L"<abc>This is the test.xml content</abc>",L"utf-8"); // We'll assume success since no files are involved.. // This sends the HTTP request (with 3 files being uploaded) to // http://www.mywebserver123abc.com/rcvFormDataUpload.aspx resp = CkHttpW_SynchronousRequest(http,L"www.mywebserver123abc.com",80,FALSE,req); if (CkHttpW_getLastMethodSuccess(http) != TRUE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); } else { wprintf(L"HTTP response status: %d\n",CkHttpResponseW_getStatusCode(resp)); // See the online reference documentation for // other information that can be obtained from the response object. CkHttpResponseW_Dispose(resp); } // To send using SSL/TLS, do this instead. // This sends to https://www.mywebserver123abc.com/rcvFormDataUpload.aspx resp = CkHttpW_SynchronousRequest(http,L"www.mywebserver123abc.com",443,TRUE,req); if (CkHttpW_getLastMethodSuccess(http) != TRUE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); } else { wprintf(L"HTTP response status: %d\n",CkHttpResponseW_getStatusCode(resp)); // See the online reference documentation for // other information that can be obtained from the response object. CkHttpResponseW_Dispose(resp); } CkHttpW_Dispose(http); CkHttpRequestW_Dispose(req); } |
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