Unicode C

Extract PDF from JSON

See more JSON Examples

Demonstrates 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. Unicode C

#include <C_CkJsonObjectW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkBinDataW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObjectW json;
    HCkStringBuilderW sb;
    HCkBinDataW bd;

    success = FALSE;

    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);

    }