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114 lines
4.2 KiB
Go
114 lines
4.2 KiB
Go
// Copyright 2017 The Forgejo Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package unittest
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import (
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"bufio"
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"fmt"
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"io"
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"net/http"
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"net/http/httptest"
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"net/url"
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"os"
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"slices"
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"strings"
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"testing"
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"code.gitea.io/gitea/modules/log"
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"github.com/stretchr/testify/assert"
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)
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// Mocks HTTP responses of a third-party service (such as GitHub, GitLab…)
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// This has two modes:
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// - live mode: the requests made to the mock HTTP server are transmitted to the live
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// service, and responses are saved as test data files
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// - test mode: the responses to requests to the mock HTTP server are read from the
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// test data files
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func NewMockWebServer(t *testing.T, liveServerBaseURL, testDataDir string, liveMode bool) *httptest.Server {
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mockServerBaseURL := ""
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ignoredHeaders := []string{"cf-ray", "server", "date", "report-to", "nel", "x-request-id"}
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server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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path := NormalizedFullPath(r.URL)
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log.Info("Mock HTTP Server: got request for path %s", r.URL.Path)
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// TODO check request method (support POST?)
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fixturePath := fmt.Sprintf("%s/%s_%s", testDataDir, r.Method, url.PathEscape(path))
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if liveMode {
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liveURL := fmt.Sprintf("%s%s", liveServerBaseURL, path)
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request, err := http.NewRequest(r.Method, liveURL, nil)
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assert.NoError(t, err, "constructing an HTTP request to %s failed", liveURL)
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for headerName, headerValues := range r.Header {
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// do not pass on the encoding: let the Transport of the HTTP client handle that for us
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if strings.ToLower(headerName) != "accept-encoding" {
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for _, headerValue := range headerValues {
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request.Header.Add(headerName, headerValue)
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}
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}
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}
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response, err := http.DefaultClient.Do(request)
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assert.NoError(t, err, "HTTP request to %s failed: %s", liveURL)
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assert.Less(t, response.StatusCode, 400, "unexpected status code for %s", liveURL)
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fixture, err := os.Create(fixturePath)
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assert.NoError(t, err, "failed to open the fixture file %s for writing", fixturePath)
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defer fixture.Close()
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fixtureWriter := bufio.NewWriter(fixture)
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for headerName, headerValues := range response.Header {
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for _, headerValue := range headerValues {
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if !slices.Contains(ignoredHeaders, strings.ToLower(headerName)) {
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_, err := fixtureWriter.WriteString(fmt.Sprintf("%s: %s\n", headerName, headerValue))
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assert.NoError(t, err, "writing the header of the HTTP response to the fixture file failed")
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}
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}
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}
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_, err = fixtureWriter.WriteString("\n")
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assert.NoError(t, err, "writing the header of the HTTP response to the fixture file failed")
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fixtureWriter.Flush()
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log.Info("Mock HTTP Server: writing response to %s", fixturePath)
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_, err = io.Copy(fixture, response.Body)
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assert.NoError(t, err, "writing the body of the HTTP response to %s failed", liveURL)
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err = fixture.Sync()
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assert.NoError(t, err, "writing the body of the HTTP response to the fixture file failed")
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}
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fixture, err := os.ReadFile(fixturePath)
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assert.NoError(t, err, "missing mock HTTP response: "+fixturePath)
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w.WriteHeader(http.StatusOK)
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// replace any mention of the live HTTP service by the mocked host
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stringFixture := strings.ReplaceAll(string(fixture), liveServerBaseURL, mockServerBaseURL)
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// parse back the fixture file into a series of HTTP headers followed by response body
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lines := strings.Split(stringFixture, "\n")
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for idx, line := range lines {
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colonIndex := strings.Index(line, ": ")
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if colonIndex != -1 {
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w.Header().Set(line[0:colonIndex], line[colonIndex+2:])
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} else {
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// we reached the end of the headers (empty line), so what follows is the body
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responseBody := strings.Join(lines[idx+1:], "\n")
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_, err := w.Write([]byte(responseBody))
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assert.NoError(t, err, "writing the body of the HTTP response failed")
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break
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}
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}
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}))
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mockServerBaseURL = server.URL
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return server
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}
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func NormalizedFullPath(url *url.URL) string {
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// TODO normalize path (remove trailing slash?)
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// TODO normalize RawQuery (order query parameters?)
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if len(url.Query()) == 0 {
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return url.EscapedPath()
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}
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return fmt.Sprintf("%s?%s", url.EscapedPath(), url.RawQuery)
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}
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