C

Create S3 Pre-Signed URL for Upload

See more Amazon S3 Examples

Demonstrates how to generate a pre-signed URL for S3 uploads. C

#include <C_CkHttp.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttp http;
    const char *bucketName;
    const char *objectName;
    const char *awsService;
    const char *httpVerb;
    int numSecondsValid;
    BOOL bUseHttps;
    const char *preSignedUrl;
    HCkHttpResponse resp;

    success = FALSE;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http = CkHttp_Create();

    CkHttp_putAwsAccessKey(http,"AWS_ACCESS_KEY");
    CkHttp_putAwsSecretKey(http,"AWS_SECRET_KEY");

    // Make sure to set your AWS region correctly
    CkHttp_putAwsRegion(http,"us-east-1");

    bucketName = "chilkat200";
    objectName = "starfish/starfish.jpg";
    awsService = "s3";
    httpVerb = "PUT";

    // The signed URL will be valid for this number of seconds:
    numSecondsValid = 86400;

    // Choose between a URL beginning with "http://" or "https://"...
    bUseHttps = TRUE;

    // Generate the pre-signed URL
    preSignedUrl = CkHttp_s3_GenPresignedUrl(http,httpVerb,bUseHttps,bucketName,objectName,numSecondsValid,awsService);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        return;
    }

    printf("Presigned URL for Upload: %s\n",preSignedUrl);

    // Here's an example of a pre-signed URL
    // 
    // http://chilkat200.s3.amazonaws.com/starfish/starfish.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIBJLOVZVXAU2AFUA%2F20200623%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20200623T234049Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=xxxxxeaea071178d772856c0a4e4c0114a8d9992f0d0812955e490d0exxxxxxx
    // 

    // You can use the pre-signed URL to upload from Chilkat
    // For example, upload by streaming from a local file
    resp = CkHttpResponse_Create();
    success = CkHttp_HttpFile(http,"PUT",preSignedUrl,"qa_data/jpg/starfish.jpg","image/jpg",resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpResponse_Dispose(resp);
        return;
    }

    printf("response status code = %d\n",CkHttpResponse_getStatusCode(resp));
    printf("response body size: %u\n",CkHttpResponse_getContentLength(resp));
    if (CkHttpResponse_getContentLength(resp) > 0) {
        printf("response body:\n");
        printf("%s\n",CkHttpResponse_bodyStr(resp));
    }



    CkHttp_Dispose(http);
    CkHttpResponse_Dispose(resp);

    }