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refactor(graph-gateway): use origin header extractor (#556)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| use alloy_primitives::bytes::Bytes; | ||
| use anyhow::anyhow; | ||
| use axum::http::{header, HeaderMap, Response, Uri}; | ||
| use thegraph::types::SubgraphId; | ||
| use toolshed::url::Url; | ||
|
|
||
| use gateway_framework::errors::Error; | ||
|
|
||
| pub async fn forward_request_to_l2( | ||
| client: &reqwest::Client, | ||
| l2_url: &Url, | ||
| original_path: &Uri, | ||
| headers: HeaderMap, | ||
| payload: Bytes, | ||
| l2_subgraph_id: Option<SubgraphId>, | ||
| ) -> Response<String> { | ||
| // We originally attempted to proxy the user's request, but that resulted in a lot of strange | ||
| // behavior from Cloudflare that was too difficult to debug. | ||
| let l2_path = l2_request_path(original_path, l2_subgraph_id); | ||
| let l2_url = l2_url.join(&l2_path).unwrap(); | ||
| tracing::info!(%l2_url, %original_path); | ||
| let headers = headers | ||
| .into_iter() | ||
| .filter_map(|(k, v)| Some((k?, v))) | ||
| .filter(|(k, _)| [header::CONTENT_TYPE, header::AUTHORIZATION, header::ORIGIN].contains(k)) | ||
| .collect(); | ||
| let response = match client | ||
| .post(l2_url) | ||
| .headers(headers) | ||
| .body(payload) | ||
| .send() | ||
| .await | ||
| .and_then(|response| response.error_for_status()) | ||
| { | ||
| Ok(response) => response, | ||
| Err(err) => { | ||
| return crate::client_query::graphql::error_response(Error::Internal(anyhow!( | ||
| "L2 gateway error: {err}" | ||
| ))) | ||
| } | ||
| }; | ||
| let status = response.status(); | ||
| if !status.is_success() { | ||
| return crate::client_query::graphql::error_response(Error::Internal(anyhow!( | ||
| "L2 gateway error: {status}" | ||
| ))); | ||
| } | ||
| let body = match response.text().await { | ||
| Ok(body) => body, | ||
| Err(err) => { | ||
| return crate::client_query::graphql::error_response(Error::Internal(anyhow!( | ||
| "L2 gateway error: {err}" | ||
| ))) | ||
| } | ||
| }; | ||
| Response::builder() | ||
| .status(status) | ||
| .header(header::CONTENT_TYPE, "application/json") | ||
| .body(body) | ||
| .unwrap() | ||
| } | ||
|
|
||
| fn l2_request_path(original_path: &Uri, l2_subgraph_id: Option<SubgraphId>) -> String { | ||
| let mut path = original_path.path().to_string(); | ||
| let subgraph_prefix = "subgraphs/id/"; | ||
| let subgraph_start = path.find(subgraph_prefix); | ||
| // rewrite path of subgraph queries to the L2 subgraph ID, conserving version constraint | ||
| if let (Some(l2_subgraph_id), Some(replace_start)) = (l2_subgraph_id, subgraph_start) { | ||
| let replace_start = replace_start + subgraph_prefix.len(); | ||
| let replace_end = path.find('^').unwrap_or(path.len()); | ||
| path.replace_range(replace_start..replace_end, &l2_subgraph_id.to_string()); | ||
| } | ||
| path | ||
| } | ||
|
|
||
| #[cfg(test)] | ||
| mod tests { | ||
| use thegraph::types::{DeploymentId, SubgraphId}; | ||
|
|
||
| use super::l2_request_path; | ||
|
|
||
| #[test] | ||
| fn test_l2_request_path() { | ||
| let deployment: DeploymentId = "QmdveVMs7nAvdBPxNoaMMAYgNcuSroneMctZDnZUgbPPP3" | ||
| .parse() | ||
| .unwrap(); | ||
| let l1_subgraph: SubgraphId = "EMRitnR1t3drKrDQSmJMSmHBPB2sGotgZE12DzWNezDn" | ||
| .parse() | ||
| .unwrap(); | ||
| let l2_subgraph: SubgraphId = "CVHoVSrdiiYvLcH4wocDCazJ1YuixHZ1SKt34UWmnQcC" | ||
| .parse() | ||
| .unwrap(); | ||
|
|
||
| // test deployment route | ||
| let mut original = format!("/api/deployments/id/{deployment}").parse().unwrap(); | ||
| let mut expected = format!("/api/deployments/id/{deployment}"); | ||
| assert_eq!(expected, l2_request_path(&original, Some(l2_subgraph))); | ||
|
|
||
| // test subgraph route | ||
| original = format!("/api/subgraphs/id/{l1_subgraph}").parse().unwrap(); | ||
| expected = format!("/api/subgraphs/id/{l2_subgraph}"); | ||
| assert_eq!(expected, l2_request_path(&original, Some(l2_subgraph))); | ||
|
|
||
| // test subgraph route with API key prefix | ||
| original = format!("/api/deadbeefdeadbeefdeadbeefdeadbeef/subgraphs/id/{l1_subgraph}") | ||
| .parse() | ||
| .unwrap(); | ||
| expected = format!("/api/deadbeefdeadbeefdeadbeefdeadbeef/subgraphs/id/{l2_subgraph}"); | ||
| assert_eq!(expected, l2_request_path(&original, Some(l2_subgraph))); | ||
|
|
||
| // test subgraph route with version constraint | ||
| original = format!("/api/subgraphs/id/{l1_subgraph}^0.0.1") | ||
| .parse() | ||
| .unwrap(); | ||
| expected = format!("/api/subgraphs/id/{l2_subgraph}^0.0.1"); | ||
| assert_eq!(expected, l2_request_path(&original, Some(l2_subgraph))); | ||
| } | ||
| } |