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(Unicode C) Box.com Streaming Upload FileDemonstrates how to upload a file to box.com, streaming the file directly from the filesystem. Note: This example requires a fix that is included in Chilkat v9.5.0.70 and above.
#include <C_CkRestW.h> #include <C_CkOAuth2W.h> #include <C_CkJsonObjectW.h> #include <C_CkStreamW.h> void ChilkatSample(void) { HCkRestW rest; BOOL success; HCkOAuth2W oauth2; BOOL bAutoReconnect; HCkJsonObjectW jsonAttr; HCkStreamW fileStream; const wchar_t *responseBody; // This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. rest = CkRestW_Create(); // Provide a previously obtained OAuth2 access token. oauth2 = CkOAuth2W_Create(); CkOAuth2W_putAccessToken(oauth2,L"BOX_ACCESS_TOKEN"); CkRestW_SetAuthOAuth2(rest,oauth2); // First, make the initial connection. // A single REST object, once connected, can be used for many Box REST API calls. // The auto-reconnect indicates that if the already-established HTTPS connection is closed, // then it will be automatically re-established as needed. bAutoReconnect = TRUE; // ---------------------------------------------------------------------- // IMPORTANT: Note that the domain is "upload.box.com", not "api.box.com" // ---------------------------------------------------------------------- success = CkRestW_Connect(rest,L"upload.box.com",443,TRUE,bAutoReconnect); if (success != TRUE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkRestW_Dispose(rest); CkOAuth2W_Dispose(oauth2); return; } // The request body uses the "multipart/form-data" format to transmit two "parts". // The first part is called "attributes" and contains a JSON object with information about the file, including the name of the file // and the ID of the parent folder. The second part contains the contents of the file. // (Note that the name of the second "part" is ignored.) CkRestW_AddHeader(rest,L"Content-Type",L"multipart/form-data"); // Provide the content for each part of the request... // First the JSON attributes. Use "0" for the root folder. // {"name":"hedgehogs.jpg", "parent":{"id":"0"}} jsonAttr = CkJsonObjectW_Create(); CkJsonObjectW_UpdateString(jsonAttr,L"name",L"hedgehogs.jpg"); CkJsonObjectW_UpdateString(jsonAttr,L"parent.id",L"0"); CkRestW_putPartSelector(rest,L"1"); CkRestW_AddHeader(rest,L"Content-Disposition",L"form-data; name=\"attributes\"; "); CkRestW_SetMultipartBodyString(rest,CkJsonObjectW_emit(jsonAttr)); // The upload will stream directly from a file. CkRestW_putPartSelector(rest,L"2"); CkRestW_AddHeader(rest,L"Content-Disposition",L"form-data; name=\"file\"; filename=\"hedgehogs.jpg\""); // "application/octet-stream" can be safely used for any type file.. CkRestW_AddHeader(rest,L"Content-Type",L"application/octet-stream"); // IMPORTANT: This example requires Chilkat v9.5.0.70 or later, for a fix that was made in // multipart/streaming uploads. fileStream = CkStreamW_Create(); CkStreamW_putSourceFile(fileStream,L"qa_data/jpg/hedgehogs.jpg"); CkRestW_SetMultipartBodyStream(rest,fileStream); // Restore the PartSelector to "0" (for safety, in case something else sends another request on this object) CkRestW_putPartSelector(rest,L"0"); // Send the multipart/form-data request, which uploads the file by streaming directly from the filesystem. responseBody = CkRestW_fullRequestMultipart(rest,L"POST",L"/api/2.0/files/content"); if (CkRestW_getLastMethodSuccess(rest) != TRUE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkRestW_Dispose(rest); CkOAuth2W_Dispose(oauth2); CkJsonObjectW_Dispose(jsonAttr); CkStreamW_Dispose(fileStream); return; } // A 201 is received for a successful upload if (CkRestW_getResponseStatusCode(rest) != 201) { wprintf(L"Box.com upload failed.\n"); wprintf(L"Request header:\n"); wprintf(L"%s\n",CkRestW_lastRequestHeader(rest)); wprintf(L"---\n"); wprintf(L"Response status code = %d\n",CkRestW_getResponseStatusCode(rest)); wprintf(L"Response body:\n"); wprintf(L"%s\n",responseBody); CkRestW_Dispose(rest); CkOAuth2W_Dispose(oauth2); CkJsonObjectW_Dispose(jsonAttr); CkStreamW_Dispose(fileStream); return; } wprintf(L"File uploaded.\n"); CkRestW_Dispose(rest); CkOAuth2W_Dispose(oauth2); CkJsonObjectW_Dispose(jsonAttr); CkStreamW_Dispose(fileStream); } |
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