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(Unicode C) QR Code Generator via api.qrserver.com REST APISee more HTTP ExamplesDemonstrates how to generate a QR code using the api.qrserver.com REST API service. For more information, see https://goqr.me/api/doc/create-qr-code/
#include <C_CkHttpW.h> #include <C_CkJsonObjectW.h> #include <C_CkHttpResponseW.h> #include <C_CkBinDataW.h> void ChilkatSample(void) { HCkHttpW http; BOOL success; HCkJsonObjectW queryParams; HCkHttpResponseW resp; HCkBinDataW bd; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. http = CkHttpW_Create(); // Send the following GET request to get a binary response. // The body of the binary response contains the image data for the QR code. // https://api.qrserver.com/v1/create-qr-code/?data=[URL-encoded-text]&size=[pixels]x[pixels] queryParams = CkJsonObjectW_Create(); CkJsonObjectW_UpdateString(queryParams,L"data",L"Hello World"); CkJsonObjectW_UpdateString(queryParams,L"size",L"100x100"); // Get a PNG file.. // Possible formats are: // png // gif // jpeg // jpg // svg // eps // Case matters. Use lowercase. CkJsonObjectW_UpdateString(queryParams,L"format",L"png"); // Send the GET request to an endpoint. // Chilkat will add the url-encoded query params passed in the JSON. resp = CkHttpW_QuickRequestParams(http,L"GET",L"https://api.qrserver.com/v1/create-qr-code/",queryParams); if (CkHttpW_getLastMethodSuccess(http) == FALSE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); CkHttpW_Dispose(http); CkJsonObjectW_Dispose(queryParams); return; } // Did it succeed? if (CkHttpResponseW_getStatusCode(resp) != 200) { // The response body, if anything, would not be the image data, but would likely be the error text (or HTML, or whatever...) wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp)); wprintf(L"Response status = %d\n",CkHttpResponseW_getStatusCode(resp)); wprintf(L"Failed.\n"); CkHttpResponseW_Dispose(resp); CkHttpW_Dispose(http); CkJsonObjectW_Dispose(queryParams); return; } // Success if we get here.. // Save the binary body as the PNG file, or you can get the bytes of the PNG.. success = CkHttpResponseW_SaveBodyBinary(resp,L"c:/temp/qa_output/qr_code.png"); // Or get the bytes: bd = CkBinDataW_Create(); CkHttpResponseW_GetBodyBd(resp,bd); // Use the bytes in bd... // See the online reference documentation for the function to access the bytes directly. CkHttpResponseW_Dispose(resp); wprintf(L"Success.\n"); CkHttpW_Dispose(http); CkJsonObjectW_Dispose(queryParams); CkBinDataW_Dispose(bd); } |
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