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refactor: replaces express with hono in provider-proxy (#815)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,46 +1,101 @@ | ||
| import { NextFunction, Request as ExpressRequest, Response as ExpressResponse } from "express"; | ||
| import { SupportedChainNetworks } from "@akashnetwork/net"; | ||
| import { createRoute, z } from "@hono/zod-openapi"; | ||
| import { bech32 } from "bech32"; | ||
| import { Context, TypedResponse } from "hono"; | ||
| import { ClientErrorStatusCode } from "hono/utils/http-status"; | ||
| import { Readable } from "stream"; | ||
|
|
||
| import { container } from "../container"; | ||
| import { httpRetry } from "../utils/retry"; | ||
|
|
||
| const DEFAULT_TIMEOUT = 5_000; | ||
| export async function proxyProviderRequest(req: ExpressRequest, incommingResponse: ExpressResponse, next: NextFunction): Promise<void> { | ||
| const { certPem, keyPem, method, body, url, network, providerAddress, timeout } = req.body; | ||
|
|
||
| try { | ||
| const proxyResult = await httpRetry( | ||
| () => | ||
| container.providerProxy.connect(url, { | ||
| method, | ||
| body, | ||
| cert: certPem, | ||
| key: keyPem, | ||
| network, | ||
| providerAddress, | ||
| timeout: Number(timeout || DEFAULT_TIMEOUT) || DEFAULT_TIMEOUT | ||
| }), | ||
| { | ||
| retryIf: result => result.ok && (!result.response.statusCode || result.response.statusCode > 500) | ||
| } | ||
| ); | ||
| const RequestPayload = z.object({ | ||
| certPem: z.string().optional(), | ||
| keyPem: z.string().optional(), | ||
| method: z.enum(["GET", "POST", "PUT", "DELETE"]), | ||
| url: z.string().url(), | ||
| body: z.string().optional(), | ||
| network: z.enum(container.netConfig.getSupportedNetworks() as [SupportedChainNetworks]).describe("Blockchain network"), | ||
| providerAddress: z | ||
| .string() | ||
| .refine(v => !!bech32.decodeUnsafe(v), "is not bech32 address") | ||
| .describe("Bech32 representation of provider wallet address"), | ||
| timeout: z.number().optional() | ||
| }); | ||
|
|
||
| if (proxyResult.ok === false && proxyResult.code === "insecureConnection") { | ||
| incommingResponse.status(400); | ||
| incommingResponse.send("Could not establish tls connection since server responded with non-tls response"); | ||
| return; | ||
| export const proxyRoute = createRoute({ | ||
| method: "post", | ||
| path: "/", | ||
| request: { | ||
| body: { | ||
| content: { | ||
| "application/json": { | ||
| schema: RequestPayload | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| responses: { | ||
| 400: { | ||
| content: { | ||
| "text/plain": { | ||
| schema: z.string() | ||
| } | ||
| }, | ||
| description: "Returned if it's not possible to establish secure connection with proxied host" | ||
| }, | ||
| 495: { | ||
| // https://http.dev/495 | ||
| content: { | ||
| "text/plain": { | ||
| schema: z.string() | ||
| } | ||
| }, | ||
| description: "Returned if host SSL certificate is invalid" | ||
| } | ||
| } | ||
| }); | ||
|
|
||
| const DEFAULT_TIMEOUT = 5_000; | ||
| export async function proxyProviderRequest(ctx: Context): Promise<Response | TypedResponse<string>> { | ||
| const { certPem, keyPem, method, body, url, network, providerAddress, timeout } = await ctx.req.json<z.infer<typeof RequestPayload>>(); | ||
|
|
||
| if (proxyResult.ok === false && proxyResult.code === "invalidCertificate") { | ||
| incommingResponse.status(495); // https://http.dev/495 | ||
| incommingResponse.send(`Invalid certificate error: ${proxyResult.reason}`); | ||
| return; | ||
| const proxyResult = await httpRetry( | ||
| () => | ||
| container.providerProxy.connect(url, { | ||
| method, | ||
| body, | ||
| cert: certPem, | ||
| key: keyPem, | ||
| network, | ||
| providerAddress, | ||
| timeout: Number(timeout || DEFAULT_TIMEOUT) || DEFAULT_TIMEOUT | ||
| }), | ||
| { | ||
| retryIf: result => result.ok && (!result.response.statusCode || result.response.statusCode > 500) | ||
| } | ||
| ); | ||
|
|
||
| if (proxyResult.ok === false && proxyResult.code === "insecureConnection") { | ||
| return ctx.text("Could not establish tls connection since server responded with non-tls response", 400); | ||
| } | ||
|
|
||
| Object.keys(proxyResult.response.headers).forEach(header => { | ||
| incommingResponse.setHeader(header, proxyResult.response.headers[header] || ""); | ||
| }); | ||
| proxyResult.response.pipe(incommingResponse).on("error", next); | ||
| } catch (error) { | ||
| next(error); | ||
| if (proxyResult.ok === false && proxyResult.code === "invalidCertificate") { | ||
| return ctx.text(`Invalid certificate error: ${proxyResult.reason}`, 495 as ClientErrorStatusCode); | ||
| } | ||
|
|
||
| const headers = new Headers(); | ||
| Object.keys(proxyResult.response.headers).forEach(header => { | ||
| const value = proxyResult.response.headers[header]; | ||
| if (Array.isArray(value)) { | ||
| value.forEach(v => headers.set(header, v)); | ||
| } else { | ||
| headers.set(header, value); | ||
| } | ||
| }); | ||
|
|
||
| return new Response(Readable.toWeb(proxyResult.response), { | ||
| status: proxyResult.response.statusCode, | ||
| statusText: proxyResult.response.statusMessage, | ||
| headers | ||
| }); | ||
| } |
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