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sloproxy
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10 kB · 335 lines
Go
at commit cade44b9
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import ( "context" "encoding/json" "errors" "fmt" "io" "net/http" "net/url" "strings" "time"
"github.com/router-for-me/CLIProxyAPI/v7/internal/httpfetch" log "github.com/sirupsen/logrus")
const userAgent = "CLIProxyAPI"const maxPluginStoreRedirects = 10
// HTTPDoer abstracts the HTTP client used to execute requests.type HTTPDoer = httpfetch.Doer
type Client struct { HTTPClient HTTPDoer RegistryURL string UserAgent string Auth []AuthConfig ResolvedAuth []ResolvedAuthConfig ResolvedAuthExpiresAt time.Time}
type Release struct { TagName string `json:"tag_name"` Assets []ReleaseAsset `json:"assets"`}
type ReleaseAsset struct { APIURL string `json:"url"` Name string `json:"name"` BrowserDownloadURL string `json:"browser_download_url"`}
func (c Client) FetchRegistry(ctx context.Context) (Registry, error) { registryURL := strings.TrimSpace(c.RegistryURL) if registryURL == "" { registryURL = DefaultRegistryURL } data, errDownload := c.get(ctx, registryURL, "application/json", RequestKindRegistry, 0) if errDownload != nil { return Registry{}, errDownload } registry, errParse := ParseRegistry(data) if errParse != nil { return Registry{}, errParse } return registry, nil}
// FetchLatestRelease returns the latest published release of the plugin's// GitHub repository, mirroring the WebUI panel update check.func (c Client) FetchLatestRelease(ctx context.Context, plugin Plugin) (Release, error) { owner, repo, errRepository := GitHubRepositoryParts(plugin.Repository) if errRepository != nil { return Release{}, errRepository } releaseURL := fmt.Sprintf( "https://api.github.com/repos/%s/%s/releases/latest", url.PathEscape(owner), url.PathEscape(repo), ) data, errDownload := c.get(ctx, releaseURL, "application/vnd.github+json", RequestKindMetadata, 0) if errDownload != nil { return Release{}, errDownload } var release Release if errDecode := json.Unmarshal(data, &release); errDecode != nil { return Release{}, fmt.Errorf("decode release: %w", errDecode) } return release, nil}
// FetchReleaseByTag returns a published release by its exact GitHub tag.func (c Client) FetchReleaseByTag(ctx context.Context, plugin Plugin, tag string) (Release, error) { owner, repo, errRepository := GitHubRepositoryParts(plugin.Repository) if errRepository != nil { return Release{}, errRepository } tag = strings.TrimSpace(tag) if tag == "" { return Release{}, fmt.Errorf("release tag is required") } releaseURL := fmt.Sprintf( "https://api.github.com/repos/%s/%s/releases/tags/%s", url.PathEscape(owner), url.PathEscape(repo), url.PathEscape(tag), ) data, errDownload := c.get(ctx, releaseURL, "application/vnd.github+json", RequestKindMetadata, 0) if errDownload != nil { return Release{}, errDownload } var release Release if errDecode := json.Unmarshal(data, &release); errDecode != nil { return Release{}, fmt.Errorf("decode release: %w", errDecode) } return release, nil}
// ReleaseVersion derives the plugin version from the release tag, stripping a// leading "v"/"V" and validating the result.func ReleaseVersion(release Release) (string, error) { version := normalizeVersion(release.TagName) if !validPluginVersion(version) { return "", fmt.Errorf("invalid release tag %q", release.TagName) } return version, nil}
func (c Client) DownloadAsset(ctx context.Context, asset ReleaseAsset) ([]byte, error) { downloadURL := strings.TrimSpace(asset.BrowserDownloadURL) apiURL := strings.TrimSpace(asset.APIURL) if downloadURL == "" || c.releaseAssetAPIAuthenticated(apiURL) { if apiURL != "" { downloadURL = apiURL } } if downloadURL == "" { return nil, fmt.Errorf("asset %q missing download url", asset.Name) } return c.get(ctx, downloadURL, "application/octet-stream", RequestKindArtifact, 0)}
func (c Client) releaseAssetAPIAuthenticated(apiURL string) bool { apiURL = strings.TrimSpace(apiURL) if apiURL == "" { return false } if item, ok := matchingResolvedAuthConfig(c.ResolvedAuth, apiURL, RequestKindArtifact); ok { return resolvedAuthConfigured(item) } return AuthConfigured(c.Auth, apiURL, RequestKindArtifact)}
func (c Client) get(ctx context.Context, requestURL string, accept string, kind string, maxSize int64) ([]byte, error) { currentURL := strings.TrimSpace(requestURL) for redirects := 0; ; redirects++ { if errURL := validatePluginStoreRequestURL(c.Auth, currentURL, kind); errURL != nil { return nil, errURL } if errExpiry := validateResolvedAuthExpiry(c.ResolvedAuth, c.ResolvedAuthExpiresAt, time.Now().UTC(), currentURL, kind); errExpiry != nil { return nil, errExpiry } headers := http.Header{ "Accept": []string{accept}, "User-Agent": []string{c.userAgent()}, } authenticated, errAuth := applyPluginStoreAuthForClient(headers, c.ResolvedAuth, c.Auth, currentURL, kind) if errAuth != nil { return nil, errAuth } resp, errDo := pluginStoreGetNoRedirect(ctx, c.httpClient(), currentURL, headers) if authenticated { for name := range headers { headers.Del(name) } if resp != nil && resp.Request != nil { resp.Request.Header = nil } } if errDo != nil { return nil, errDo } if pluginStoreRedirectStatus(resp.StatusCode) { nextURL, errRedirect := pluginStoreRedirectURL(resp, currentURL) if errClose := resp.Body.Close(); errClose != nil { log.WithError(errClose).Debug("failed to close plugin store redirect body") } if errRedirect != nil { return nil, errRedirect } if redirects >= maxPluginStoreRedirects { return nil, fmt.Errorf("stopped after %d redirects", maxPluginStoreRedirects) } currentURL = nextURL continue } return readPluginStoreResponse(resp, maxSize, authenticated) }}
func (c Client) httpClient() HTTPDoer { if c.HTTPClient != nil { return c.HTTPClient } return http.DefaultClient}
func (c Client) userAgent() string { if strings.TrimSpace(c.UserAgent) != "" { return strings.TrimSpace(c.UserAgent) } return userAgent}
func pluginStoreGetNoRedirect(ctx context.Context, client HTTPDoer, requestURL string, headers http.Header) (*http.Response, error) { if client == nil { client = http.DefaultClient } req, errRequest := http.NewRequestWithContext(ctx, http.MethodGet, requestURL, nil) if errRequest != nil { return nil, fmt.Errorf("create request: %w", errRequest) } req.Header = headers.Clone() resp, errDo := pluginStoreNoRedirectClient(client).Do(req) if errDo != nil { return nil, pluginStoreRequestError(requestURL, errDo) } return resp, nil}
func pluginStoreNoRedirectClient(client HTTPDoer) HTTPDoer { httpClient, ok := client.(*http.Client) if !ok { return client } clone := *httpClient clone.CheckRedirect = func(*http.Request, []*http.Request) error { return http.ErrUseLastResponse } return &clone}
func pluginStoreRedirectStatus(status int) bool { switch status { case http.StatusMovedPermanently, http.StatusFound, http.StatusSeeOther, http.StatusTemporaryRedirect, http.StatusPermanentRedirect: return true default: return false }}
func pluginStoreRedirectURL(resp *http.Response, requestURL string) (string, error) { location := strings.TrimSpace(resp.Header.Get("Location")) if location == "" { return "", fmt.Errorf("redirect missing Location header") } base, errBase := url.Parse(requestURL) if errBase != nil { return "", fmt.Errorf("parse redirect base: %w", errBase) } next, errNext := base.Parse(location) if errNext != nil { return "", fmt.Errorf("parse redirect location: %w", errNext) } if next.Scheme == "" || next.Host == "" { return "", fmt.Errorf("redirect location is not absolute") } return next.String(), nil}
func readPluginStoreResponse(resp *http.Response, maxSize int64, authenticated bool) ([]byte, error) { defer func() { if errClose := resp.Body.Close(); errClose != nil { log.WithError(errClose).Debug("failed to close plugin store response body") } }() if resp.StatusCode < http.StatusOK || resp.StatusCode >= http.StatusMultipleChoices { if authenticated { return nil, fmt.Errorf("unexpected status %d", resp.StatusCode) } body, _ := io.ReadAll(io.LimitReader(resp.Body, 4096)) return nil, fmt.Errorf("unexpected status %d: %s", resp.StatusCode, strings.TrimSpace(string(body))) } reader := io.Reader(resp.Body) if maxSize > 0 { reader = io.LimitReader(resp.Body, maxSize+1) } data, errRead := io.ReadAll(reader) if errRead != nil { return nil, fmt.Errorf("read response: %w", errRead) } if maxSize > 0 && int64(len(data)) > maxSize { return nil, fmt.Errorf("response exceeds maximum allowed size of %d bytes", maxSize) } return data, nil}
func pluginStoreRequestError(requestURL string, err error) error { parsed, errParse := url.Parse(strings.TrimSpace(requestURL)) safeURL := "plugin store url" if errParse == nil && parsed.Scheme != "" && parsed.Host != "" { parsed.User = nil parsed.RawQuery = "" parsed.ForceQuery = false parsed.Fragment = "" safeURL = parsed.String() } var urlError *url.Error if errors.As(err, &urlError) && urlError.Err != nil { err = urlError.Err } return fmt.Errorf("request %s failed: %w", safeURL, err)}
func SelectReleaseAssets(release Release, id, version, goos, goarch string) (ReleaseAsset, ReleaseAsset, error) { archiveName := ArchiveName(id, version, goos, goarch) var archiveAsset ReleaseAsset var checksumAsset ReleaseAsset for _, asset := range release.Assets { switch strings.TrimSpace(asset.Name) { case archiveName: archiveAsset = asset case "checksums.txt": checksumAsset = asset } } if strings.TrimSpace(archiveAsset.Name) == "" { return ReleaseAsset{}, ReleaseAsset{}, fmt.Errorf("release asset %s not found", archiveName) } if strings.TrimSpace(checksumAsset.Name) == "" { return ReleaseAsset{}, ReleaseAsset{}, fmt.Errorf("release asset checksums.txt not found") } return archiveAsset, checksumAsset, nil}
func ArchiveName(id, version, goos, goarch string) string { return fmt.Sprintf( "%s_%s_%s_%s.zip", strings.TrimSpace(id), strings.TrimSpace(version), strings.TrimSpace(goos), strings.TrimSpace(goarch), )}