Newer regions only support the newer scheme and not the older signature system.ĬURL conference This weekend I participated in the CURL conference in Nuremberg. PS: if you have older code for Amazon, you may need to update it to use AWS4-HMAC-SHA256, too. The examples will show how to upload/download an image file to Amazon S3 in your bucket. You can than add more options like SSL certificates and start the transfer. Our plugin functions add extra headers for amazon and pass the URL to CURL with a few options. The headers are included in the signature and passed to CURL for the transfer. Especially when uploading a file which does not fit in memory, it may be an option to hash it yourself. Or you provide a hash, a lowercase hex encoded SHA256. So if you provide the data to upload/send before our call to setup with our input functions, the plugin can hash it and include the hash. The payload sent needs to be included in the signature. Verb defines which HTTP operation to do: get, put, delete or post. Usually it is something like s3. with various region names included. The domain can be calculated by plugin or overwritten by you. The path defines the path to the file, e.g. The region defines where your server is, for me eu-central-1 with server in Frankfurt, Germany. The key and secret are available from Amazon on their website. To setup this, you pass our plugin the required informations: AWSAccessKeyId, AWSSecretAccessKey, Region, Service, Path, Domain, Verb, HashedPayload, Headers. They are required to authenticate and talk to the web services. So for next plugins, I implemented AWS4-HMAC-SHA256 signatures. But for Amazon's web services, some extra work is needed. Normally using any web services is not much work as our CURL functions in the plugin handle the transfer thing with authentication and encryption. Amazon S3 and other services in Xojo and FileMaker The last weeks I worked on integrating Amazon S3 for a client.
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