Can we somehow achieve or build a canister with a interface bahaving like a classic web server

paulyoung · May 23, 2021, 4:20pm

In agent-rs, all requests to canisters implementing the HTTP interface are converted to query calls:

dfinity/agent-rs/blob/6804d29c2cb2e34c6d4116c74edd9cf5687ccce4/ic-utils/src/interfaces/http_request.rs#L81

    
      
          }
          
          
impl<'agent> Canister<'agent, HttpRequestCanister> {
              pub fn http_request<'canister: 'agent, M: Into<String>, U: Into<String>, B: AsRef<[u8]>>(
                  &'canister self,
                  method: M,
                  url: U,
                  headers: Vec<HeaderField>,
                  body: B,
              ) -> impl 'agent + SyncCall<(HttpResponse,)> {
                  self.query_("http_request")
                      .with_arg(HttpRequest {
                          method: method.into(),
                          url: url.into(),
                          headers,
                          body: body.as_ref(),
                      })
                      .build()
              }
          
          
    pub fn http_request_stream_callback<'canister: 'agent, M: Into<String>>(

It seems like it should be trivial to inspect the request method and convert POST/PUT/DELETE/etc to an update call instead, but I’m assuming this code is only for development purposes and won’t affect the HTTP gateway on the network.

I took a look at dfn_http but I haven’t been able to figure out how/where that’s used or intended to be used.

I would contact the author but everything appears as dfinity-bot. It would be helpful if the commits showed the author as well as the committer.

@nomeata, do you know if update calls work with the HTTP interface for canisters?

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Can we somehow achieve or build a canister with a interface bahaving like a classic web server

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