mirror of https://github.com/mautrix/go.git
84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
package appservice
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import (
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"bytes"
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"context"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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)
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const WebsocketCommandHTTPProxy = "http_proxy"
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type HTTPProxyRequest struct {
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Method string `json:"method"`
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Path string `json:"path"`
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Query string `json:"query"`
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Headers http.Header `json:"headers"`
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Body json.RawMessage `json:"body"`
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}
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type HTTPProxyResponse struct {
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Status int `json:"status"`
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Headers http.Header `json:"headers"`
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Body json.RawMessage `json:"body"`
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bodyBuf bytes.Buffer
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}
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func (p *HTTPProxyResponse) Header() http.Header {
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return p.Headers
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}
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func (p *HTTPProxyResponse) Write(bytes []byte) (int, error) {
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if p.Status == 0 {
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p.Status = http.StatusOK
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}
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return p.bodyBuf.Write(bytes)
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}
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func (p *HTTPProxyResponse) WriteHeader(statusCode int) {
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p.Status = statusCode
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}
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func (as *AppService) WebsocketHTTPProxy(cmd WebsocketCommand) (bool, interface{}) {
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var req HTTPProxyRequest
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if err := json.Unmarshal(cmd.Data, &req); err != nil {
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return false, fmt.Errorf("failed to parse proxy request: %w", err)
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}
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if cmd.Ctx == nil {
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cmd.Ctx = context.Background()
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}
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reqURL := (&url.URL{
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Scheme: "http",
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Host: "localhost",
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Path: req.Path,
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RawQuery: req.Query,
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}).String()
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httpReq, err := http.NewRequestWithContext(cmd.Ctx, req.Method, reqURL, bytes.NewReader(req.Body))
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if err != nil {
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return false, fmt.Errorf("failed to create fake HTTP request: %w", err)
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}
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httpReq.Header = req.Headers
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var resp HTTPProxyResponse
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resp.Headers = make(http.Header)
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as.Router.ServeHTTP(&resp, httpReq)
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if resp.bodyBuf.Len() > 0 {
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bodyData := resp.bodyBuf.Bytes()
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if json.Valid(bodyData) {
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resp.Body = bodyData
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} else {
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resp.Body = make([]byte, 2+base64.RawStdEncoding.EncodedLen(len(bodyData)))
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resp.Body[0] = '"'
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base64.RawStdEncoding.Encode(resp.Body[1:], bodyData)
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resp.Body[len(resp.Body)-1] = '"'
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}
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}
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return true, &resp
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}
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