修改注释及代码重构
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zyj
237
libs/request.go
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237
libs/request.go
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@@ -0,0 +1,237 @@
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package libs
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import (
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"bufio"
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"bytes"
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net"
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"net/http"
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"strings"
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"time"
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)
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// ---------- 外部接口和类型定义 ----------
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// AdbDevice 定义了通过 ADB 隧道创建设备连接的接口
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type AdbDevice interface {
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// CreateConnection 建立到设备的 TCP 连接
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// network 通常为 "tcp"，port 为设备上服务监听端口
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CreateConnection(network string, port int) (net.Conn, error)
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}
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// HTTPResponse 封装 HTTP 响应数据
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type HTTPResponse struct {
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Content []byte // 响应体内容
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Status int // HTTP 状态码
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Reason string // 状态描述
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}
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// JSON 将响应体解析为指定的结构体
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func (r *HTTPResponse) JSON(v interface{}) error {
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return json.Unmarshal(r.Content, v)
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}
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// Text 返回响应体的文本内容
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func (r *HTTPResponse) Text() string {
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return string(r.Content)
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}
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// ---------- 自定义错误类型 ----------
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var (
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// ErrHTTPTimeout 表示 HTTP 请求超时
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ErrHTTPTimeout = errors.New("HTTP 请求超时")
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// ErrHTTPFailed 表示 HTTP 请求失败
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ErrHTTPFailed = errors.New("HTTP 请求失败")
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)
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// ---------- AdbHTTPConnection：通过 ADB 隧道发送 HTTP 请求 ----------
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// AdbHTTPConnection 基于 net.Conn 实现的 HTTP 连接
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// 通过 ADB 端口转发直接与设备端 UIAutomator2 服务通信
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type AdbHTTPConnection struct {
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Conn net.Conn
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}
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// NewAdbHTTPConnection 创建一个新的 ADB HTTP 连接
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// dev 为设备接口，port 为设备端服务端口，timeout 为连接超时
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func NewAdbHTTPConnection(dev AdbDevice, port int, timeout time.Duration) (*AdbHTTPConnection, error) {
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conn, err := dev.CreateConnection("tcp", port)
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if err != nil {
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return nil, fmt.Errorf("无法连接到 UIAutomator2 服务: %w", err)
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}
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_ = conn.SetDeadline(time.Now().Add(timeout))
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return &AdbHTTPConnection{Conn: conn}, nil
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}
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// Close 关闭底层连接
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func (c *AdbHTTPConnection) Close() error {
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if c.Conn != nil {
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return c.Conn.Close()
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}
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return nil
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}
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// sendRequest 将 HTTP 请求写入连接并读取响应
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// 通过原始 TCP 连接发送 HTTP 报文，避免依赖标准 http.Client
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func (c *AdbHTTPConnection) sendRequest(req *http.Request, timeout time.Duration) (*http.Response, error) {
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// 设置读写截止时间
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if timeout > 0 {
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_ = c.Conn.SetDeadline(time.Now().Add(timeout))
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} else {
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_ = c.Conn.SetDeadline(time.Time{})
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}
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// 序列化 HTTP 请求为原始报文
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var buf bytes.Buffer
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// 请求行：METHOD PATH HTTP/1.1
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path := req.URL.RequestURI()
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if path == "" {
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path = "/"
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}
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fmt.Fprintf(&buf, "%s %s HTTP/1.1\r\n", req.Method, path)
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fmt.Fprintf(&buf, "Host: localhost\r\n")
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// 设置默认请求头
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if req.Header.Get("User-Agent") == "" {
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req.Header.Set("User-Agent", "uiautomator2")
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}
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if req.Header.Get("Accept-Encoding") == "" {
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req.Header.Set("Accept-Encoding", "")
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}
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if req.Header.Get("Content-Type") == "" {
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req.Header.Set("Content-Type", "application/json")
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}
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// 写入请求头
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for k, vals := range req.Header {
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for _, v := range vals {
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fmt.Fprintf(&buf, "%s: %s\r\n", k, v)
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}
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}
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// 处理请求体
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var bodyBytes []byte
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if req.Body != nil {
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var err error
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bodyBytes, err = io.ReadAll(req.Body)
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if err != nil {
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return nil, fmt.Errorf("读取请求体失败: %w", err)
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}
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fmt.Fprintf(&buf, "Content-Length: %d\r\n", len(bodyBytes))
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} else {
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fmt.Fprintf(&buf, "Content-Length: 0\r\n")
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}
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// 请求头与请求体之间的空行
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buf.WriteString("\r\n")
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// 发送请求头
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if _, err := c.Conn.Write(buf.Bytes()); err != nil {
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return nil, fmt.Errorf("发送请求头失败: %w", err)
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}
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// 发送请求体
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if len(bodyBytes) > 0 {
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if _, err := c.Conn.Write(bodyBytes); err != nil {
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return nil, fmt.Errorf("发送请求体失败: %w", err)
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}
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}
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// 使用标准库解析 HTTP 响应
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reader := bufio.NewReader(c.Conn)
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resp, err := http.ReadResponse(reader, req)
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if err != nil {
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return nil, fmt.Errorf("读取 HTTP 响应失败: %w", err)
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}
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return resp, nil
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}
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// ---------- HttpRequest：高层 HTTP 请求封装 ----------
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// HttpRequest 向设备端 UIAutomator2 服务发送 HTTP 请求
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// ctx 为上下文控制，dev 为设备接口，devicePort 为设备端服务端口
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// method 为 HTTP 方法，path 为请求路径
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// data 为请求体数据（会被 JSON 编码），timeoutSecs 为超时秒数
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// printRequest 为 true 时输出 curl 风格的调试信息
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func HttpRequest(ctx context.Context, dev AdbDevice, devicePort int, method, path string, data map[string]interface{}, timeoutSecs float64, printRequest bool) (*HTTPResponse, error) {
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// 默认超时 10 秒
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if timeoutSecs <= 0 {
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timeoutSecs = 10.0
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}
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timeout := time.Duration(timeoutSecs * float64(time.Second))
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// 调试模式：打印 curl 风格的请求信息
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if printRequest {
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now := time.Now().Format("15:04:05.000")
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url := fmt.Sprintf("http://127.0.0.1:%d%s", devicePort, path)
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if data != nil {
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b, _ := json.Marshal(data)
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fmt.Printf("# HTTP 超时=%.3f\n%s $ curl -X %s %s -d '%s'\n", timeoutSecs, now, method, url, string(b))
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} else {
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fmt.Printf("# HTTP 超时=%.3f\n%s $ curl -X %s %s\n", timeoutSecs, now, method, url)
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}
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}
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// 构造 HTTP 请求
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var body io.Reader
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if data != nil {
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b, err := json.Marshal(data)
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if err != nil {
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return nil, fmt.Errorf("JSON 编码失败: %w", err)
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}
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body = bytes.NewReader(b)
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}
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req, err := http.NewRequestWithContext(ctx, method, "http://localhost"+path, body)
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if err != nil {
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return nil, fmt.Errorf("创建 HTTP 请求失败: %w", err)
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}
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req.Header.Set("User-Agent", "uiautomator2")
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req.Header.Set("Accept-Encoding", "")
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req.Header.Set("Content-Type", "application/json")
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// 建立到设备的连接
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connWrapper, err := NewAdbHTTPConnection(dev, devicePort, timeout)
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if err != nil {
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return nil, err
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}
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defer connWrapper.Close()
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// 发送请求并读取响应
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resp, err := connWrapper.sendRequest(req, timeout)
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if err != nil {
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var netErr net.Error
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if errors.As(err, &netErr) && netErr.Timeout() {
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return nil, fmt.Errorf("%w: %v", ErrHTTPTimeout, err)
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}
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return nil, fmt.Errorf("%w: %v", ErrHTTPFailed, err)
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}
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defer resp.Body.Close()
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// 读取响应体
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content, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("读取响应体失败: %w", err)
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("HTTP 请求失败: %d %s", resp.StatusCode, resp.Status)
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}
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response := &HTTPResponse{
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Content: content,
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Status: resp.StatusCode,
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Reason: resp.Status,
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}
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if printRequest {
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now := time.Now().Format("15:04:05.000")
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fmt.Printf("%s 响应 >>>\n%s\n<<< 结束\n\n", now, strings.TrimRight(response.Text(), "\n"))
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}
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return response, nil
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}
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