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Signed bulk upload with curl

FTITest
Edited

I want to upload a huge amount of images with a batch file using curl. Cause of security reasons I want to use signed upload. So I created a signature as described in https://support.cloudinary.com/hc/en-us/community/posts/360000183051-File-upload-using-curl-) It was not complete clear for me what string I have to use for the sha1 key. I tested it with the api secrect alone cause i have no transcode parameters and the following batch:

FOR /F %%a IN ('dir /b "%ImageDir%\*.jpg"') DO (
 curl -o result0 -F "upload_preset=%upload_preset%" -F file=%ImageDir%\%%a&api_key=someapikey&signature=somesignature" http://api.cloudinary.com/v1_1/%cloud%/image/upload

)

I got alwas the response: {"error":{"message":"Upload preset must be whitelisted for unsigned uploads"}}

But I wanted to use signed uploads. Can you please give me a hint how to do this?

 

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3 comments

Date Votes
  • Aditi Madan

    Hi,

    Structure of the curl image upload: curl https://api.cloudinary.com/v1_1/<cloud_name>/image/upload -X POST --data 'file=<url of image>&timestamp= <current unix timestamp>&public_id=<insert public_id>&transformation=<insert transformation>&api_key=<your api key>&signature=<generated signature>'   

    If we want to upload sample image with transformation w_200,h_200,c_limit and public id=sample then the signature will be comprised of

    1. public id 

    2. timestamp(epoch timestamp)

    3. transformation and 

    4. generated API secret/signature(Note that this is not your account API secret key but a generated signature)   

    In this case the signature parameters will be - public_id=sample&timestamp=1514500082&transformation=w_200,h_200,c_limit<Insert your API secret here without comma or space> 

    The signature is generated using SHA-1. Since you are using signed upload, you don't need to use upload preset. 

    For more information on signatures: https://cloudinary.com/documentation/upload_images#creating_api_authentication_signatures

    Regards,
    Aditi

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  • FTITest
    Edited

    Hello Aditi,

    I rewrote the code exactly how you wrote:

    curl -k https://api.cloudinary.com/v1_1/%cloud%/image/upload -X POST --data "file=%ImageDir%\%%a&timestamp=15741687674&public_id=%%a&api_key=<somekey>&signature=<somesignature>"

    but I got the message

    "message":"Unsupported source URL: Images2\\IM04933

    why are here two backslashes? the curl comman I've only one. How can I upload local files?

    Could you help me to fix this? Why can't I transmit simply the api key and secret via https?

    Best regards

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  • Aditi Madan

    Hi,

    Can you please open a support ticket here: https://support.cloudinary.com/hc/en-us/requests/new and share all the params you passed including the parameters you used to generate the signature and I will be able to assist you better.

    Regards,
    Aditi

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