http: Refactor more handler code duplication into the router
package main import ( "fmt" "net/http" "strings"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/filemode"
"github.com/go-git/go-git/v5/plumbing/format/diff"
"go.lindenii.runxiyu.org/lindenii-common/misc"
)
// The file patch type from go-git isn't really usable in HTML templates
// either.
type usable_file_patch struct {
From diff.File
To diff.File
Chunks []usable_chunk
}
type usable_chunk struct {
Operation diff.Operation
Content string
}
func handle_repo_commit(w http.ResponseWriter, r *http.Request, params map[string]any) {
group_name, repo_name, commit_id_specified_string := params["group_name"].(string), params["repo_name"].(string), params["commit_id"].(string)
repo, description, err := open_git_repo(r.Context(), group_name, repo_name)
if err != nil {
http.Error(w, "Error opening repo: "+err.Error(), http.StatusInternalServerError)
return
}
params["repo_description"] = description
repo, commit_id_specified_string := params["repo"].(*git.Repository), params["commit_id"].(string)
commit_id_specified_string_without_suffix := strings.TrimSuffix(commit_id_specified_string, ".patch")
commit_id := plumbing.NewHash(commit_id_specified_string_without_suffix)
commit_object, err := repo.CommitObject(commit_id)
if err != nil {
http.Error(w, "Error getting commit object: "+err.Error(), http.StatusInternalServerError)
return
}
if commit_id_specified_string_without_suffix != commit_id_specified_string {
patch, err := format_patch_from_commit(commit_object)
if err != nil {
http.Error(w, "Error formatting patch: "+err.Error(), http.StatusInternalServerError)
return
}
fmt.Fprintln(w, patch)
return
}
commit_id_string := commit_object.Hash.String()
if commit_id_string != commit_id_specified_string {
http.Redirect(w, r, commit_id_string, http.StatusSeeOther)
return
}
params["commit_object"] = commit_object
params["commit_id"] = commit_id_string
parent_commit_hash, patch, err := get_patch_from_commit(commit_object)
if err != nil {
http.Error(w, "Error getting patch from commit: "+err.Error(), http.StatusInternalServerError)
return
}
params["parent_commit_hash"] = parent_commit_hash.String()
params["patch"] = patch
// TODO: Remove unnecessary context
// TODO: Prepend "+"/"-"/" " instead of solely distinguishing based on color
usable_file_patches := make([]usable_file_patch, 0)
for _, file_patch := range patch.FilePatches() {
from, to := file_patch.Files()
if from == nil {
from = fake_diff_file_null
}
if to == nil {
to = fake_diff_file_null
}
chunks := []usable_chunk{}
for _, chunk := range file_patch.Chunks() {
content := chunk.Content()
if len(content) > 0 && content[0] == '\n' {
content = "\n" + content
} // Horrible hack to fix how browsers newlines that immediately proceed <pre>
chunks = append(chunks, usable_chunk{
Operation: chunk.Type(),
Content: content,
})
}
usable_file_patch := usable_file_patch{
Chunks: chunks,
From: from,
To: to,
}
usable_file_patches = append(usable_file_patches, usable_file_patch)
}
params["file_patches"] = usable_file_patches
render_template(w, "repo_commit", params)
}
type fake_diff_file struct {
hash plumbing.Hash
mode filemode.FileMode
path string
}
func (f fake_diff_file) Hash() plumbing.Hash {
return f.hash
}
func (f fake_diff_file) Mode() filemode.FileMode {
return f.mode
}
func (f fake_diff_file) Path() string {
return f.path
}
var fake_diff_file_null = fake_diff_file{
hash: plumbing.NewHash("0000000000000000000000000000000000000000"),
mode: misc.First_or_panic(filemode.New("100644")),
path: "",
}
package main import ( "net/http"
"github.com/go-git/go-git/v5"
)
func handle_repo_index(w http.ResponseWriter, r *http.Request, params map[string]any) {
group_name, repo_name := params["group_name"].(string), params["repo_name"].(string)
repo, description, err := open_git_repo(r.Context(), group_name, repo_name)
if err != nil {
http.Error(w, "Error opening repo: "+err.Error(), http.StatusInternalServerError)
return
}
params["repo_description"] = description
repo, repo_name, group_name := params["repo"].(*git.Repository), params["repo_name"].(string), params["group_name"].(string)
ref_hash, err := get_ref_hash_from_type_and_name(repo, params["ref_type"].(string), params["ref_name"].(string))
if err != nil {
http.Error(w, "Error getting ref hash: "+err.Error(), http.StatusInternalServerError)
return
}
recent_commits, err := get_recent_commits(repo, ref_hash, 3)
if err != nil {
http.Error(w, "Error getting recent commits: "+err.Error(), http.StatusInternalServerError)
return
}
params["commits"] = recent_commits
commit_object, err := repo.CommitObject(ref_hash)
if err != nil {
http.Error(w, "Error getting commit object: "+err.Error(), http.StatusInternalServerError)
return
}
tree, err := commit_object.Tree()
if err != nil {
http.Error(w, "Error getting file tree: "+err.Error(), http.StatusInternalServerError)
return
}
params["readme_filename"], params["readme"] = render_readme_at_tree(tree)
params["files"] = build_display_git_tree(tree)
params["http_clone_url"] = generate_http_remote_url(group_name, repo_name)
params["ssh_clone_url"] = generate_ssh_remote_url(group_name, repo_name)
render_template(w, "repo_index", params)
}
package main import ( "net/http"
"github.com/go-git/go-git/v5"
)
// TODO: I probably shouldn't include *all* commits here...
func handle_repo_log(w http.ResponseWriter, r *http.Request, params map[string]any) {
repo, description, err := open_git_repo(r.Context(), params["group_name"].(string), params["repo_name"].(string))
if err != nil {
http.Error(w, "Error opening repo: "+err.Error(), http.StatusInternalServerError)
return
}
params["repo_description"] = description
repo := params["repo"].(*git.Repository)
ref_hash, err := get_ref_hash_from_type_and_name(repo, params["ref_type"].(string), params["ref_name"].(string))
if err != nil {
http.Error(w, "Error getting ref hash: "+err.Error(), http.StatusInternalServerError)
return
}
commits, err := get_recent_commits(repo, ref_hash, -1)
if err != nil {
http.Error(w, "Error getting recent commits: "+err.Error(), http.StatusInternalServerError)
return
}
params["commits"] = commits
render_template(w, "repo_log", params)
}
package main import ( "fmt" "net/http" "path" "strings"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing/object"
)
func handle_repo_raw(w http.ResponseWriter, r *http.Request, params map[string]any) {
raw_path_spec := params["rest"].(string)
group_name, repo_name, path_spec := params["group_name"].(string), params["repo_name"].(string), strings.TrimSuffix(raw_path_spec, "/")
repo, path_spec := params["repo"].(*git.Repository), strings.TrimSuffix(raw_path_spec, "/")
params["path_spec"] = path_spec
repo, description, err := open_git_repo(r.Context(), group_name, repo_name)
if err != nil {
http.Error(w, "Error opening repo: "+err.Error(), http.StatusInternalServerError)
return
}
params["repo_description"] = description
ref_hash, err := get_ref_hash_from_type_and_name(repo, params["ref_type"].(string), params["ref_name"].(string))
if err != nil {
http.Error(w, "Error getting ref hash: "+err.Error(), http.StatusInternalServerError)
return
}
commit_object, err := repo.CommitObject(ref_hash)
if err != nil {
http.Error(w, "Error getting commit object: "+err.Error(), http.StatusInternalServerError)
return
}
tree, err := commit_object.Tree()
if err != nil {
http.Error(w, "Error getting file tree: "+err.Error(), http.StatusInternalServerError)
return
}
var target *object.Tree
if path_spec == "" {
target = tree
} else {
target, err = tree.Tree(path_spec)
if err != nil {
file, err := tree.File(path_spec)
if err != nil {
http.Error(w, "Error retrieving path: "+err.Error(), http.StatusInternalServerError)
return
}
if len(raw_path_spec) != 0 && raw_path_spec[len(raw_path_spec)-1] == '/' {
http.Redirect(w, r, "../"+path_spec, http.StatusSeeOther)
return
}
file_contents, err := file.Contents()
if err != nil {
http.Error(w, "Error reading file: "+err.Error(), http.StatusInternalServerError)
return
}
fmt.Fprintln(w, file_contents)
return
}
}
if len(raw_path_spec) != 0 && raw_path_spec[len(raw_path_spec)-1] != '/' {
http.Redirect(w, r, path.Base(path_spec)+"/", http.StatusSeeOther)
return
}
params["files"] = build_display_git_tree(target)
render_template(w, "repo_raw_dir", params)
}
package main import ( "bytes" "html/template" "net/http" "path" "strings" chroma_formatters_html "github.com/alecthomas/chroma/v2/formatters/html" chroma_lexers "github.com/alecthomas/chroma/v2/lexers" chroma_styles "github.com/alecthomas/chroma/v2/styles"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing/object"
)
func handle_repo_tree(w http.ResponseWriter, r *http.Request, params map[string]any) {
raw_path_spec := params["rest"].(string)
group_name, repo_name, path_spec := params["group_name"].(string), params["repo_name"].(string), strings.TrimSuffix(raw_path_spec, "/")
repo, path_spec := params["repo"].(*git.Repository), strings.TrimSuffix(raw_path_spec, "/")
params["path_spec"] = path_spec
repo, description, err := open_git_repo(r.Context(), group_name, repo_name)
if err != nil {
http.Error(w, "Error opening repo: "+err.Error(), http.StatusInternalServerError)
return
}
params["repo_description"] = description
ref_hash, err := get_ref_hash_from_type_and_name(repo, params["ref_type"].(string), params["ref_name"].(string))
if err != nil {
http.Error(w, "Error getting ref hash: "+err.Error(), http.StatusInternalServerError)
return
}
commit_object, err := repo.CommitObject(ref_hash)
if err != nil {
http.Error(w, "Error getting commit object: "+err.Error(), http.StatusInternalServerError)
return
}
tree, err := commit_object.Tree()
if err != nil {
http.Error(w, "Error getting file tree: "+err.Error(), http.StatusInternalServerError)
return
}
var target *object.Tree
if path_spec == "" {
target = tree
} else {
target, err = tree.Tree(path_spec)
if err != nil {
file, err := tree.File(path_spec)
if err != nil {
http.Error(w, "Error retrieving path: "+err.Error(), http.StatusInternalServerError)
return
}
if len(raw_path_spec) != 0 && raw_path_spec[len(raw_path_spec)-1] == '/' {
http.Redirect(w, r, "../"+path_spec, http.StatusSeeOther)
return
}
file_contents, err := file.Contents()
if err != nil {
http.Error(w, "Error reading file: "+err.Error(), http.StatusInternalServerError)
return
}
lexer := chroma_lexers.Match(path_spec)
if lexer == nil {
lexer = chroma_lexers.Fallback
}
iterator, err := lexer.Tokenise(nil, file_contents)
if err != nil {
http.Error(w, "Error tokenizing code: "+err.Error(), http.StatusInternalServerError)
return
}
var formatted_unencapsulated bytes.Buffer
style := chroma_styles.Get("autumn")
formatter := chroma_formatters_html.New(chroma_formatters_html.WithClasses(true), chroma_formatters_html.TabWidth(8))
err = formatter.Format(&formatted_unencapsulated, style, iterator)
if err != nil {
http.Error(w, "Error formatting code: "+err.Error(), http.StatusInternalServerError)
return
}
formatted_encapsulated := template.HTML(formatted_unencapsulated.Bytes())
params["file_contents"] = formatted_encapsulated
render_template(w, "repo_tree_file", params)
return
}
}
if len(raw_path_spec) != 0 && raw_path_spec[len(raw_path_spec)-1] != '/' {
http.Redirect(w, r, path.Base(path_spec)+"/", http.StatusSeeOther)
return
}
params["readme_filename"], params["readme"] = render_readme_at_tree(target)
params["files"] = build_display_git_tree(target)
render_template(w, "repo_tree_dir", params)
}
package main
import (
"errors"
"fmt"
"net/http"
"strconv"
"strings"
"github.com/jackc/pgx/v5"
"go.lindenii.runxiyu.org/lindenii-common/clog"
)
type http_router_t struct{}
func (router *http_router_t) ServeHTTP(w http.ResponseWriter, r *http.Request) {
clog.Info("Incoming HTTP: " + r.RemoteAddr + " " + r.Method + " " + r.RequestURI)
segments, _, err := parse_request_uri(r.RequestURI)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
non_empty_last_segments_len := len(segments)
trailing_slash := false
if segments[len(segments)-1] == "" {
non_empty_last_segments_len--
trailing_slash = true
}
if segments[0] == ":" {
if len(segments) < 2 {
http.Error(w, "Blank system endpoint", http.StatusNotFound)
return
} else if len(segments) == 2 && redirect_with_slash(w, r) {
return
}
switch segments[1] {
case "static":
static_handler.ServeHTTP(w, r)
return
case "source":
source_handler.ServeHTTP(w, r)
return
}
}
params := make(map[string]any)
params["global"] = global_data
var _user_id int // 0 for none
_user_id, params["username"], err = get_user_info_from_request(r)
if errors.Is(err, http.ErrNoCookie) {
} else if errors.Is(err, pgx.ErrNoRows) {
} else if err != nil {
http.Error(w, "Error getting user info from request: "+err.Error(), http.StatusInternalServerError)
return
}
if _user_id == 0 {
params["user_id"] = ""
} else {
params["user_id"] = strconv.Itoa(_user_id)
}
if segments[0] == ":" {
switch segments[1] {
case "login":
handle_login(w, r, params)
return
case "users":
handle_users(w, r, params)
return
default:
http.Error(w, fmt.Sprintf("Unknown system module type: %s", segments[1]), http.StatusNotFound)
return
}
}
separator_index := -1
for i, part := range segments {
if part == ":" {
separator_index = i
break
}
}
// TODO
if separator_index != 1 {
http.Error(w, "Subgroups haven't been implemented yet", http.StatusNotImplemented)
return
}
switch {
case non_empty_last_segments_len == 0:
handle_index(w, r, params)
case separator_index == -1:
http.Error(w, "Group indexing hasn't been implemented yet", http.StatusNotImplemented)
case non_empty_last_segments_len == separator_index+1:
http.Error(w, "Group root hasn't been implemented yet", http.StatusNotImplemented)
case non_empty_last_segments_len == separator_index+2:
if redirect_with_slash(w, r) {
return
}
module_type := segments[separator_index+1]
params["group_name"] = segments[0]
switch module_type {
case "repos":
handle_group_repos(w, r, params)
default:
http.Error(w, fmt.Sprintf("Unknown module type: %s", module_type), http.StatusNotFound)
}
default:
module_type := segments[separator_index+1]
module_name := segments[separator_index+2]
params["group_name"] = segments[0]
group_name := segments[0] params["group_name"] = group_name
switch module_type {
case "repos":
params["repo_name"] = module_name
if non_empty_last_segments_len > separator_index+3 {
switch segments[separator_index+3] {
case "info":
err = handle_repo_info(w, r, params)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
return
case "git-upload-pack":
err = handle_upload_pack(w, r, params)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
return
}
}
params["ref_type"], params["ref_name"], err = get_param_ref_and_type(r)
if err != nil {
if errors.Is(err, err_no_ref_spec) {
params["ref_type"] = ""
} else {
http.Error(w, "Error querying ref type: "+err.Error(), http.StatusInternalServerError)
return
}
}
// TODO: subgroups
params["repo"], params["repo_description"], err = open_git_repo(r.Context(), group_name, module_name)
if err != nil {
http.Error(w, "Error opening repo: "+err.Error(), http.StatusInternalServerError)
return
}
if non_empty_last_segments_len == separator_index+3 {
if redirect_with_slash(w, r) {
return
}
handle_repo_index(w, r, params)
return
}
repo_feature := segments[separator_index+3]
switch repo_feature {
case "info":
err = handle_repo_info(w, r, params)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
case "git-upload-pack":
err = handle_upload_pack(w, r, params)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
case "tree":
params["rest"] = strings.Join(segments[separator_index+4:], "/")
if len(segments) < separator_index+5 && redirect_with_slash(w, r) {
return
}
handle_repo_tree(w, r, params)
case "raw":
params["rest"] = strings.Join(segments[separator_index+4:], "/")
if len(segments) < separator_index+5 && redirect_with_slash(w, r) {
return
}
handle_repo_raw(w, r, params)
case "log":
if non_empty_last_segments_len > separator_index+4 {
http.Error(w, "Too many parameters", http.StatusBadRequest)
return
}
if redirect_with_slash(w, r) {
return
}
handle_repo_log(w, r, params)
case "commit":
if trailing_slash {
http.Redirect(w, r, strings.TrimSuffix(r.URL.Path, "/"), http.StatusSeeOther)
// TODO
return
}
params["commit_id"] = segments[separator_index+4]
handle_repo_commit(w, r, params)
default:
http.Error(w, fmt.Sprintf("Unknown repo feature: %s", repo_feature), http.StatusNotFound)
}
default:
http.Error(w, fmt.Sprintf("Unknown module type: %s", module_type), http.StatusNotFound)
}
}
}
var err_bad_request = errors.New("Bad Request")