mirror of
https://github.com/woodchen-ink/proxy-go.git
synced 2025-07-18 16:41:54 +08:00
117 lines
3.4 KiB
Go
117 lines
3.4 KiB
Go
package middleware
|
||
|
||
import (
|
||
"errors"
|
||
"io"
|
||
"log"
|
||
"net/http"
|
||
"proxy-go/internal/config"
|
||
"proxy-go/internal/utils"
|
||
"strings"
|
||
"syscall"
|
||
"time"
|
||
)
|
||
|
||
type FixedPathConfig struct {
|
||
Path string `json:"Path"`
|
||
TargetHost string `json:"TargetHost"`
|
||
TargetURL string `json:"TargetURL"`
|
||
}
|
||
|
||
func FixedPathProxyMiddleware(configs []config.FixedPathConfig) func(http.Handler) http.Handler {
|
||
return func(next http.Handler) http.Handler {
|
||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||
startTime := time.Now() // 添加时间记录
|
||
// 检查是否匹配任何固定路径
|
||
for _, cfg := range configs {
|
||
if strings.HasPrefix(r.URL.Path, cfg.Path) {
|
||
// 创建新的请求
|
||
targetPath := strings.TrimPrefix(r.URL.Path, cfg.Path)
|
||
targetURL := cfg.TargetURL + targetPath
|
||
|
||
proxyReq, err := http.NewRequest(r.Method, targetURL, r.Body)
|
||
if err != nil {
|
||
http.Error(w, "Error creating proxy request", http.StatusInternalServerError)
|
||
log.Printf("[%s] %s %s -> 500 (error creating request: %v) [%v]",
|
||
utils.GetClientIP(r), r.Method, r.URL.Path, err, time.Since(startTime))
|
||
return
|
||
}
|
||
|
||
// 复制原始请求的 header
|
||
for key, values := range r.Header {
|
||
for _, value := range values {
|
||
proxyReq.Header.Add(key, value)
|
||
}
|
||
}
|
||
|
||
// 设置必要的头部
|
||
proxyReq.Host = cfg.TargetHost
|
||
proxyReq.Header.Set("Host", cfg.TargetHost)
|
||
proxyReq.Header.Set("X-Real-IP", utils.GetClientIP(r))
|
||
proxyReq.Header.Set("X-Scheme", r.URL.Scheme)
|
||
|
||
// 发送代理请求
|
||
client := &http.Client{}
|
||
resp, err := client.Do(proxyReq)
|
||
if err != nil {
|
||
http.Error(w, "Error forwarding request", http.StatusBadGateway)
|
||
log.Printf("[%s] %s %s -> 502 (proxy error: %v) [%v]",
|
||
utils.GetClientIP(r), r.Method, r.URL.Path, err, time.Since(startTime))
|
||
return
|
||
}
|
||
defer resp.Body.Close()
|
||
|
||
// 复制响应头
|
||
for key, values := range resp.Header {
|
||
for _, value := range values {
|
||
w.Header().Add(key, value)
|
||
}
|
||
}
|
||
|
||
// 设置响应状态码
|
||
w.WriteHeader(resp.StatusCode)
|
||
|
||
// 复制响应体
|
||
bytesCopied, err := io.Copy(w, resp.Body)
|
||
if err := handleCopyError(err); err != nil {
|
||
log.Printf("[%s] Error copying response: %v", utils.GetClientIP(r), err)
|
||
}
|
||
|
||
// 记录成功的请求
|
||
log.Printf("| %-6s | %3d | %12s | %15s | %10s | %-30s | %-50s -> %s",
|
||
r.Method, // HTTP方法，左对齐占6位
|
||
resp.StatusCode, // 状态码，占3位
|
||
time.Since(startTime), // 处理时间，占12位
|
||
utils.GetClientIP(r), // IP地址，占15位
|
||
utils.FormatBytes(bytesCopied), // 传输大小，占10位
|
||
utils.GetRequestSource(r), // 请求来源
|
||
r.URL.Path, // 请求路径，左对齐占50位
|
||
targetURL, // 目标URL
|
||
)
|
||
|
||
return
|
||
}
|
||
}
|
||
|
||
// 如果没有匹配的固定路径，继续下一个处理器
|
||
next.ServeHTTP(w, r)
|
||
})
|
||
}
|
||
}
|
||
|
||
func handleCopyError(err error) error {
|
||
if err == nil {
|
||
return nil
|
||
}
|
||
|
||
// 忽略常见的连接关闭错误
|
||
if errors.Is(err, syscall.EPIPE) || // broken pipe
|
||
errors.Is(err, syscall.ECONNRESET) || // connection reset by peer
|
||
strings.Contains(err.Error(), "broken pipe") ||
|
||
strings.Contains(err.Error(), "connection reset by peer") {
|
||
return nil
|
||
}
|
||
|
||
return err
|
||
}
|