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Example: Streaming with WASIp3

This is an example showcasing the use of HTTP request and response body streaming within a guest component using WASIp3.

Preparing the Environment

Run the following commands to setup a virtual environment with Python.

python3 -m venv venv
source venv/bin/activate

Install the required packages specified in the requirements.txt using the command:

pip3 install -r requirements.txt

Building and Running the Examples

spin build --up

Testing the App

curl -i -H 'content-type: text/plain' --data-binary @- http://127.0.0.1:3000/echo <<EOF
’Twas brillig, and the slithy toves
      Did gyre and gimble in the wabe:
All mimsy were the borogoves,
      And the mome raths outgrabe.
EOF

The above should echo the request body in the response.

In addition to the /echo endpoint, the app supports a /hash-all endpoint which concurrently downloads one or more URLs and streams the SHA-256 hashes of their contents. You can test it with e.g.:

curl -i \
    -H 'url: https://webassembly.github.io/spec/core/' \
    -H 'url: https://www.w3.org/groups/wg/wasm/' \
    -H 'url: https://bytecodealliance.org/' \
    http://127.0.0.1:3000/hash-all

If you run into any problems, please file an issue!