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(Unicode C) Extract PDF from JSONDemonstrates how to extract a PDF file contained within JSON. The file is represented as a base64 string within the JSON. Note: This example can extract any type of file, not just a PDF file.
#include <C_CkJsonObjectW.h> #include <C_CkStringBuilderW.h> #include <C_CkBinDataW.h> void ChilkatSample(void) { HCkJsonObjectW json; BOOL success; HCkStringBuilderW sb; HCkBinDataW bd; json = CkJsonObjectW_Create(); // Load the JSON. success = CkJsonObjectW_LoadFile(json,L"qa_data/json/JSR5U.json"); if (success != TRUE) { wprintf(L"%s\n",CkJsonObjectW_lastErrorText(json)); CkJsonObjectW_Dispose(json); return; } // The JSON we loaded contains this: // { // ... // ... // "data": { // "content": "JVBERi0xLjQ..." // } // ... // ... // } sb = CkStringBuilderW_Create(); CkJsonObjectW_StringOfSb(json,L"data.content",sb); bd = CkBinDataW_Create(); CkBinDataW_AppendEncodedSb(bd,sb,L"base64"); success = CkBinDataW_WriteFile(bd,L"qa_output/a0015.pdf"); CkJsonObjectW_Dispose(json); CkStringBuilderW_Dispose(sb); CkBinDataW_Dispose(bd); } |
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