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(Unicode C) Download File from DropboxDownloads a file from Dropbox.
#include <C_CkRestW.h> #include <C_CkJsonObjectW.h> #include <C_CkBinDataW.h> #include <C_CkDateTimeW.h> #include <C_CkDtObjW.h> void ChilkatSample(void) { HCkRestW rest; BOOL success; HCkJsonObjectW json; HCkBinDataW bd; const wchar_t *apiResult; HCkJsonObjectW jsonResult; int size; const wchar_t *rev; const wchar_t *clientModified; HCkDateTimeW ckdt; BOOL bLocalTime; HCkDtObjW dt; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // A Dropbox access token should have been previously obtained. // Dropbox access tokens do not expire. // See Dropbox Access Token. rest = CkRestW_Create(); // Connect to Dropbox success = CkRestW_Connect(rest,L"content.dropboxapi.com",443,TRUE,TRUE); if (success != TRUE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkRestW_Dispose(rest); return; } // Add request headers. CkRestW_AddHeader(rest,L"Authorization",L"Bearer DROPBOX_ACCESS_TOKEN"); // The download "parameters" are contained in JSON passed in an HTTP request header. // This is the JSON indicating the file to be downloaded: // { // "path": "/Homework/lit/hamlet.xml", // } json = CkJsonObjectW_Create(); CkJsonObjectW_AppendString(json,L"path",L"/Homework/lit/hamlet.xml"); CkRestW_AddHeader(rest,L"Dropbox-API-Arg",CkJsonObjectW_emit(json)); bd = CkBinDataW_Create(); success = CkRestW_FullRequestNoBodyBd(rest,L"POST",L"/2/files/download",bd); if (success == FALSE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkRestW_Dispose(rest); CkJsonObjectW_Dispose(json); CkBinDataW_Dispose(bd); return; } // When successful, Dropbox responds with a 200 response code. if (CkRestW_getResponseStatusCode(rest) != 200) { // Examine the request/response to see what happened. wprintf(L"response status code = %d\n",CkRestW_getResponseStatusCode(rest)); wprintf(L"response status text = %s\n",CkRestW_responseStatusText(rest)); wprintf(L"response header: %s\n",CkRestW_responseHeader(rest)); wprintf(L"response body (if any): %s\n",CkBinDataW_getString(bd,L"utf-8")); wprintf(L"---\n"); wprintf(L"LastRequestStartLine: %s\n",CkRestW_lastRequestStartLine(rest)); wprintf(L"LastRequestHeader: %s\n",CkRestW_lastRequestHeader(rest)); CkRestW_Dispose(rest); CkJsonObjectW_Dispose(json); CkBinDataW_Dispose(bd); return; } // The file was downloaded into bd. // Save it to the filesystem. success = CkBinDataW_WriteFile(bd,L"c:/temp/qa_output/hamlet.xml"); // Information about the downloaded file is also available as JSON in a response header. // The "dropbox-api-result" response header contains the information. For example: apiResult = CkRestW_responseHdrByName(rest,L"dropbox-api-result"); wprintf(L"%s\n",apiResult); // In this case, the pretty-formatted dropbox-api-result JSON looks like this: // { // "name": "hamlet.xml", // "path_lower": "/homework/lit/hamlet.xml", // "path_display": "/Homework/lit/hamlet.xml", // "id": "id:74FkdeNuyKAAAAAAAAAAAQ", // "client_modified": "2016-06-02T23:19:00Z", // "server_modified": "2016-06-02T23:19:00Z", // "rev": "9482db15f", // "size": 279658 // } // Load the JSON, pretty-print it, and demonstrate how to get some values... jsonResult = CkJsonObjectW_Create(); CkJsonObjectW_putEmitCompact(jsonResult,FALSE); CkJsonObjectW_Load(jsonResult,apiResult); // Show the JSON pretty-printed... wprintf(L"%s\n",CkJsonObjectW_emit(jsonResult)); // Sample code to get data from the JSON response: size = CkJsonObjectW_IntOf(jsonResult,L"size"); wprintf(L"size = %d\n",size); rev = CkJsonObjectW_stringOf(jsonResult,L"rev"); wprintf(L"rev = %s\n",rev); clientModified = CkJsonObjectW_stringOf(jsonResult,L"client_modified"); ckdt = CkDateTimeW_Create(); CkDateTimeW_SetFromTimestamp(ckdt,clientModified); bLocalTime = TRUE; dt = CkDateTimeW_GetDtObj(ckdt,bLocalTime); wprintf(L"%d/%d/%d %d:%d\n",CkDtObjW_getDay(dt),CkDtObjW_getMonth(dt),CkDtObjW_getYear(dt),CkDtObjW_getHour(dt),CkDtObjW_getMinute(dt)); CkDtObjW_Dispose(dt); CkRestW_Dispose(rest); CkJsonObjectW_Dispose(json); CkBinDataW_Dispose(bd); CkJsonObjectW_Dispose(jsonResult); CkDateTimeW_Dispose(ckdt); } |
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