68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
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// Copyright (C) 2024 Umorpha Systems
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// SPDX-License-Identifier: AGPL-3.0-or-later
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package main
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import (
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"fmt"
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"net/http"
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"net/url"
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"regexp"
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"strings"
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)
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// - /HEAD
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// - /objects/[0-9a-f]{2}/[0-9a-f]{38}
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// - /objects/pack/
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// - /objects/info/packs (*)
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// - /objects/info/alternates
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// - /objects/info/http-alternates
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// - /info/refs (*)
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var reGitHTTP = regexp.MustCompile(`^.*/(?:` +
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`HEAD` + `|` +
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`objects(?:/[/a-z0-9]*)?` + `|` +
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`info/refs(?:[?&](?:service=[-_a-z0-9]+)$` + `)` +
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`)$`)
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// routeGitHTTP takes a gitprotocol-http(5) request and parses it into
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// a repoPath component and a service query component.
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//
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// - Returns ("", "", "", nil) if the request does not look like a
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// gitprotocol-http(5) request.
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//
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// Returns ("", "", err) if the request looks like a
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// gitprotocol-http(5) request, but has a malformed query string.
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func routeGitHTTP(r *http.Request) (repoPath, file, service string, err error) {
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idx := strings.LastIndex(r.RequestURI, "/info/refs")
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if idx < 0 {
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return "", "", "", nil
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}
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repoPath = r.RequestURI[:idx]
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rawQuery := r.RequestURI[idx+len("/info/refs"):]
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var query url.Values
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if rawQuery != "" {
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queryPrefix := "?"
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if strings.Contains(repoPath, "?") {
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queryPrefix = "&"
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}
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if !strings.HasPrefix(rawQuery, queryPrefix) {
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return "", "", "", nil
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}
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var err error
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query, err = url.ParseQuery(rawQuery[len(queryPrefix):])
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if err != nil {
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return "", "", "", fmt.Errorf("invalid query string: %w", err)
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}
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if len(query) > 1 || len(query["service"]) > 1 {
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return "", "", "", fmt.Errorf("invalid query string: too many query parameters")
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}
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if len(query) > 0 && query["service"] == nil {
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return "", "", "", fmt.Errorf("invalid query string: unexpected query parameters")
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}
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}
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return repoPath, "TODO", query.Get("service"), nil
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}
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