Add file processing

This commit is contained in:
2025-11-22 17:33:40 +08:00
parent 44af6acc53
commit 19ff49c917
9 changed files with 501 additions and 1 deletions

212
internal/handler/file.go Normal file
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@@ -0,0 +1,212 @@
package handler
import (
"io"
"net/http"
"net/url"
"os"
"path/filepath"
"strings"
)
// ListFiles function: Traverse all files in the specified directory and return a slice of the file path
func ListFiles(dir string) ([]string, error) {
var files []string
err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if !info.IsDir() {
files = append(files, path)
}
return nil
})
return files, err
}
// Get Content function: Read the content of a specified file and return it
func GetFileContent(filePath string) ([]byte, error) {
file, err := os.Open(filePath)
if err != nil {
return nil, err
}
defer file.Close()
// Get File Size
fileInfo, err := file.Stat()
if err != nil {
return nil, err
}
fileSize := fileInfo.Size()
// Read File Content
fileContent := make([]byte, fileSize)
_, err = file.Read(fileContent)
if err != nil {
return nil, err
}
return fileContent, nil
}
// fileHandler function: Handle file requests
func fileHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Server", "MeowMusicEmbeddedServer")
// Obtain the path of the request
filePath := r.URL.Path
// Check if the request path starts with "/url/"
if strings.HasPrefix(filePath, "/url/") {
// Extract the URL after "/url/"
urlPath := filePath[len("/url/"):]
// Decode the URL path in case it's URL encoded
decodedURL, err := url.QueryUnescape(urlPath)
if err != nil {
NotFoundHandler(w, r)
return
}
// Determine the protocol based on the URL path
var protocol string
if strings.HasPrefix(decodedURL, "http/") {
protocol = "http://"
} else if strings.HasPrefix(decodedURL, "https/") {
protocol = "https://"
} else {
NotFoundHandler(w, r)
return
}
// Remove the protocol part from the decoded URL
decodedURL = strings.TrimPrefix(decodedURL, "http/")
decodedURL = strings.TrimPrefix(decodedURL, "https/")
// Correctly concatenate the protocol with the decoded URL
decodedURL = protocol + decodedURL
// Create a new HTTP request to the decoded URL, without copying headers
req, err := http.NewRequest("GET", decodedURL, nil)
if err != nil {
NotFoundHandler(w, r)
return
}
// Send the request and get the response
client := &http.Client{}
resp, err := client.Do(req)
if err != nil || resp.StatusCode != http.StatusOK {
NotFoundHandler(w, r)
return
}
defer resp.Body.Close()
// Read the response body into a byte slice
fileContent, err := io.ReadAll(resp.Body)
if err != nil {
NotFoundHandler(w, r)
return
}
// Set appropriate Content-Type based on file extension
ext := filepath.Ext(decodedURL)
switch ext {
case ".mp3":
w.Header().Set("Content-Type", "audio/mpeg")
case ".wav":
w.Header().Set("Content-Type", "audio/wav")
case ".flac":
w.Header().Set("Content-Type", "audio/flac")
case ".aac":
w.Header().Set("Content-Type", "audio/aac")
case ".ogg":
w.Header().Set("Content-Type", "audio/ogg")
case ".m4a":
w.Header().Set("Content-Type", "audio/mp4")
case ".amr":
w.Header().Set("Content-Type", "audio/amr")
case ".jpg", ".jpeg":
w.Header().Set("Content-Type", "image/jpeg")
case ".png":
w.Header().Set("Content-Type", "image/png")
case ".gif":
w.Header().Set("Content-Type", "image/gif")
case ".bmp":
w.Header().Set("Content-Type", "image/bmp")
case ".svg":
w.Header().Set("Content-Type", "image/svg+xml")
case ".webp":
w.Header().Set("Content-Type", "image/webp")
case ".txt":
w.Header().Set("Content-Type", "text/plain")
case ".lrc":
w.Header().Set("Content-Type", "text/plain")
case ".mrc":
w.Header().Set("Content-Type", "text/plain")
case ".json":
w.Header().Set("Content-Type", "application/json")
default:
w.Header().Set("Content-Type", "application/octet-stream")
}
// Write file content to response
w.Write(fileContent)
return
}
// Construct the complete file path
fullFilePath := filepath.Join("./files", filePath)
// Try replacing '+' with ' ' and check if the file exists
tempFilePath := strings.ReplaceAll(fullFilePath, "+", " ")
if _, err := os.Stat(tempFilePath); err == nil {
fullFilePath = tempFilePath
}
// Get file content
fileContent, err := GetFileContent(fullFilePath)
if err != nil {
// If file not found, try replacing ' ' with '+' and check again
tempFilePath = strings.ReplaceAll(fullFilePath, " ", "+")
fileContent, err = GetFileContent(tempFilePath)
if err != nil {
NotFoundHandler(w, r)
return
}
}
// Set appropriate Content-Type based on file extension
ext := filepath.Ext(filePath)
switch ext {
case ".mp3":
w.Header().Set("Content-Type", "audio/mpeg")
case ".wav":
w.Header().Set("Content-Type", "audio/wav")
case ".flac":
w.Header().Set("Content-Type", "audio/flac")
case ".aac":
w.Header().Set("Content-Type", "audio/aac")
case ".ogg":
w.Header().Set("Content-Type", "audio/ogg")
case ".m4a":
w.Header().Set("Content-Type", "audio/mp4")
case ".amr":
w.Header().Set("Content-Type", "audio/amr")
case ".jpg", ".jpeg":
w.Header().Set("Content-Type", "image/jpeg")
case ".png":
w.Header().Set("Content-Type", "image/png")
case ".gif":
w.Header().Set("Content-Type", "image/gif")
case ".bmp":
w.Header().Set("Content-Type", "image/bmp")
case ".svg":
w.Header().Set("Content-Type", "image/svg+xml")
case ".webp":
w.Header().Set("Content-Type", "image/webp")
case ".txt":
w.Header().Set("Content-Type", "text/plain")
case ".lrc":
w.Header().Set("Content-Type", "text/plain")
case ".mrc":
w.Header().Set("Content-Type", "text/plain")
case ".json":
w.Header().Set("Content-Type", "application/json")
default:
w.Header().Set("Content-Type", "application/octet-stream")
}
// Write file content to response
w.Write(fileContent)
}

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package handler
import (
"log"
"net/http"
"github.com/OmniX-Space/MeowBox-Core/internal/service"
)
func NotFoundHandler(w http.ResponseWriter, r *http.Request) {}
// ErrorHandler Common error response handler
func ErrorHandler(w http.ResponseWriter, r *http.Request, statusCode int) {
loadErrorTemplate()
w.WriteHeader(statusCode)
SetHeaders(w, "text/html; charset=utf-8")
var title, message string
switch statusCode {
case http.StatusNotFound:
title = ""
message = ""
case http.StatusInternalServerError:
title = ""
message = ""
case http.StatusBadRequest:
title = ""
message = ""
case http.StatusForbidden:
title = ""
message = ""
default:
title = "Error"
message = "An unexpected error occurred."
}
data := service.ErrorPageData{
StatusCode: statusCode,
Title: title,
Message: message,
}
if err := errorTemplate.Execute(w, data); err != nil {
log.Printf("[Error] Failed to render error page: %v", err)
}
}

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@@ -0,0 +1 @@
package handler

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package handler
import (
"embed"
"html/template"
"log"
"net/http"
"strings"
"sync"
"github.com/OmniX-Space/MeowBox-Core/internal/service"
)
//go:embed web
var webFiles embed.FS
//go:embed web/index.html
var pageTemplateContent string
//go:embed web/httperr.html
var errorTemplateContent string
var (
pageTemplate *template.Template
errorTemplate *template.Template
errorOnce sync.Once
pageOnce sync.Once
)
// loadPageTemplate Initialize template (executed only once)
func loadPageTemplate() {
pageOnce.Do(func() {
var err error
pageTemplate, err = template.New("page").Parse(pageTemplateContent)
if err != nil {
log.Fatalf("[Error] Failed to parse page template: %v", err)
}
})
}
// loadErrorTemplate Initialize template (executed only once)
func loadErrorTemplate() {
errorOnce.Do(func() {
var err error
errorTemplate, err = template.New("error").Parse(errorTemplateContent)
if err != nil {
log.Fatalf("[Error] Failed to parse error template: %v", err)
}
})
}
// StaticFileHandler Embedded static file service
func StaticFileHandler(w http.ResponseWriter, r *http.Request) {
path := r.URL.Path
// Clean path, make sure it starts with "web/"
path = strings.TrimPrefix(path, "/")
if path == "" {
ErrorHandler(w, r, http.StatusNotFound)
return
}
// Concatenate embed.FS path
filePath := "web/" + path
data, err := webFiles.ReadFile(filePath)
if err != nil {
log.Printf("[Error] Static file not found: %s", filePath)
ErrorHandler(w, r, http.StatusNotFound)
return
}
// Set Content-Type
contentType := service.GetContentType(path)
SetHeaders(w, contentType)
_, _ = w.Write(data)
}
func SetHeaders(w http.ResponseWriter, contentType string) {
w.Header().Set("Content-Type", contentType)
w.Header().Set("Server", "CloudCat-Project")
}

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145
internal/service/mime.go Normal file
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package service
import "strings"
func GetContentType(filename string) string {
// Convert file names to lowercase for case insensitive comparison
lowerFilename := strings.ToLower(filename)
switch {
// Text files
case strings.HasSuffix(lowerFilename, ".css"):
return "text/css; charset=utf-8"
case strings.HasSuffix(lowerFilename, ".js"):
return "application/javascript; charset=utf-8"
case strings.HasSuffix(lowerFilename, ".json"):
return "application/json; charset=utf-8"
case strings.HasSuffix(lowerFilename, ".xml"):
return "application/xml; charset=utf-8"
case strings.HasSuffix(lowerFilename, ".html"), strings.HasSuffix(lowerFilename, ".htm"):
return "text/html; charset=utf-8"
case strings.HasSuffix(lowerFilename, ".txt"):
return "text/plain; charset=utf-8"
case strings.HasSuffix(lowerFilename, ".md"):
return "text/markdown; charset=utf-8"
case strings.HasSuffix(lowerFilename, ".csv"):
return "text/csv; charset=utf-8"
// Image files
case strings.HasSuffix(lowerFilename, ".webp"):
return "image/webp"
case strings.HasSuffix(lowerFilename, ".png"):
return "image/png"
case strings.HasSuffix(lowerFilename, ".jpg"), strings.HasSuffix(lowerFilename, ".jpeg"):
return "image/jpeg"
case strings.HasSuffix(lowerFilename, ".gif"):
return "image/gif"
case strings.HasSuffix(lowerFilename, ".bmp"):
return "image/bmp"
case strings.HasSuffix(lowerFilename, ".ico"):
return "image/x-icon"
case strings.HasSuffix(lowerFilename, ".svg"), strings.HasSuffix(lowerFilename, ".svgz"):
return "image/svg+xml"
case strings.HasSuffix(lowerFilename, ".tiff"), strings.HasSuffix(lowerFilename, ".tif"):
return "image/tiff"
case strings.HasSuffix(lowerFilename, ".avif"):
return "image/avif"
// Audio files
case strings.HasSuffix(lowerFilename, ".mp3"):
return "audio/mpeg"
case strings.HasSuffix(lowerFilename, ".wav"):
return "audio/wav"
case strings.HasSuffix(lowerFilename, ".ogg"):
return "audio/ogg"
case strings.HasSuffix(lowerFilename, ".flac"):
return "audio/flac"
case strings.HasSuffix(lowerFilename, ".aac"):
return "audio/aac"
case strings.HasSuffix(lowerFilename, ".m4a"):
return "audio/mp4"
// Video files
case strings.HasSuffix(lowerFilename, ".mp4"):
return "video/mp4"
case strings.HasSuffix(lowerFilename, ".webm"):
return "video/webm"
case strings.HasSuffix(lowerFilename, ".ogg"), strings.HasSuffix(lowerFilename, ".ogv"):
return "video/ogg"
case strings.HasSuffix(lowerFilename, ".mov"):
return "video/quicktime"
case strings.HasSuffix(lowerFilename, ".avi"):
return "video/x-msvideo"
case strings.HasSuffix(lowerFilename, ".wmv"):
return "video/x-ms-wmv"
case strings.HasSuffix(lowerFilename, ".flv"):
return "video/x-flv"
case strings.HasSuffix(lowerFilename, ".mkv"):
return "video/x-matroska"
// Font files
case strings.HasSuffix(lowerFilename, ".woff"):
return "font/woff"
case strings.HasSuffix(lowerFilename, ".woff2"):
return "font/woff2"
case strings.HasSuffix(lowerFilename, ".ttf"):
return "font/ttf"
case strings.HasSuffix(lowerFilename, ".otf"):
return "font/otf"
// Archive files
case strings.HasSuffix(lowerFilename, ".zip"):
return "application/zip"
case strings.HasSuffix(lowerFilename, ".rar"):
return "application/x-rar-compressed"
case strings.HasSuffix(lowerFilename, ".gz"):
return "application/gzip"
case strings.HasSuffix(lowerFilename, ".tar"):
return "application/x-tar"
case strings.HasSuffix(lowerFilename, ".7z"):
return "application/x-7z-compressed"
case strings.HasSuffix(lowerFilename, ".bz2"):
return "application/x-bzip2"
case strings.HasSuffix(lowerFilename, ".xz"):
return "application/x-xz"
// Document files
case strings.HasSuffix(lowerFilename, ".pdf"):
return "application/pdf"
case strings.HasSuffix(lowerFilename, ".doc"):
return "application/msword"
case strings.HasSuffix(lowerFilename, ".docx"):
return "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
case strings.HasSuffix(lowerFilename, ".xls"):
return "application/vnd.ms-excel"
case strings.HasSuffix(lowerFilename, ".xlsx"):
return "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
case strings.HasSuffix(lowerFilename, ".ppt"):
return "application/vnd.ms-powerpoint"
case strings.HasSuffix(lowerFilename, ".pptx"):
return "application/vnd.openxmlformats-officedocument.presentationml.presentation"
case strings.HasSuffix(lowerFilename, ".odt"):
return "application/vnd.oasis.opendocument.text"
case strings.HasSuffix(lowerFilename, ".ods"):
return "application/vnd.oasis.opendocument.spreadsheet"
case strings.HasSuffix(lowerFilename, ".odp"):
return "application/vnd.oasis.opendocument.presentation"
// Other files
case strings.HasSuffix(lowerFilename, ".rtf"):
return "application/rtf"
case strings.HasSuffix(lowerFilename, ".epub"):
return "application/epub+zip"
case strings.HasSuffix(lowerFilename, ".apk"):
return "application/vnd.android.package-archive"
case strings.HasSuffix(lowerFilename, ".exe"):
return "application/x-msdownload"
case strings.HasSuffix(lowerFilename, ".dmg"):
return "application/x-apple-diskimage"
case strings.HasSuffix(lowerFilename, ".iso"):
return "application/x-iso9660-image"
default:
return "application/octet-stream"
}
}

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@@ -1 +0,0 @@
package service

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@@ -27,3 +27,17 @@ type Config struct {
Prefix string `json:"prefix"`
} `json:"database"`
}
// ErrorPageData Data model for error page template
type ErrorPageData struct {
StatusCode int
Title string
Message string
}
// IndexPageData Data model for index page template
type IndexPageData struct {
StatusCode int
Title string
I18n string
}