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@@ -0,0 +1,147 @@
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+package conn
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+
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+import (
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+ "bytes"
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+ "errors"
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+ "fmt"
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+ "regexp"
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+ "strconv"
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+ "strings"
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+ "time"
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+)
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+
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+// 连接服务结构
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+type HostInfo struct {
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+ Proto string `json:"proto" yaml:"proto"` // 协议
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+ Version uint8 `json:"version" yaml:"version"` // 版本
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+ Host string `json:"host" yaml:"host"` // 连接的IP地址或者域名
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+ Bind string `json:"bind,omitempty" yaml:"bind"` // 绑定的地址
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+ Port uint16 `json:"port,omitempty" yaml:"port"` // 连接的端口
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+ Path string `json:"path,omitempty" yaml:"path"` // 连接的路径
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+ Hash string `json:"hash,omitempty" yaml:"hash"` // 连接验证使用,格式 method:key
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+ Proxy bool `json:"proxy,omitempty" yaml:"proxy"` // 是否代理
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+ Nat bool `json:"nat,omitempty" yaml:"nat"` // 是否是前端nat的方式处理
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+ Priority int16 `json:"priority,omitempty" yaml:"priority"` // 优先级,-1 表示不可用,0 表示最高优先级(为了兼容没有优先级的节点),1-100 表示优先级别,数值越高优先级越高,不过这是由应用端决定的规则
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+ Errors uint16 `json:"errors,omitempty" yaml:"errors"` // 连接失败计数,如果成功了则重置为0
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+ Updated time.Time `json:"updated" yaml:"updated"` // 节点信息刷新时间
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+}
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+
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+// 从 url 中解析信息
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+// url 格式:ws2://xor:s^7mv7L!Mrn8Y!vn@127.0.0.1:14541/wsv2?proxy=1
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+// 仅支持客户端连接使用
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+func ParseUrl(url string) (hostInfo *HostInfo, err error) {
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+ mx := regexp.MustCompile(`^([a-z]+)([0-9]*)://([^#/\?]+)(/[\w\-/]+)?`).FindStringSubmatch(url)
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+ if mx == nil {
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+ return nil, errors.New("invalid url")
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+ }
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+ protocol := mx[1]
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+ version, _ := strconv.Atoi(mx[2])
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+ host := mx[3]
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+ index := strings.LastIndex(host, "@")
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+ hash := ""
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+ if index >= 0 {
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+ hash = host[0:index]
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+ host = host[index+1:]
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+ }
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+ // 检查是否ipv6,解析出ip和端口
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+ index = strings.Index(host, "]:")
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+ port := 0
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+ if index > 0 {
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+ // ipv6 地址和端口
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+ port, err = strconv.Atoi(host[index+2:])
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+ if err != nil {
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+ return nil, err
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+ }
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+ host = host[1:index]
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+ } else {
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+ hs := strings.Split(host, ":")
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+ if len(hs) == 2 {
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+ host = hs[0]
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+ port, err = strconv.Atoi(hs[1])
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+ if err != nil {
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+ return nil, err
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+ }
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+ }
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+ }
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+ path := ""
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+ if len(mx) > 4 {
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+ path = mx[4]
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+ }
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+ hostInfo = &HostInfo{
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+ Proto: protocol,
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+ Version: uint8(version),
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+ Host: host,
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+ Port: uint16(port),
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+ Hash: hash,
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+ Path: path,
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+ }
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+ // 查找是否代理
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+ url = url[len(mx[0]):]
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+ if regexp.MustCompile(`[\?&]proxy=1`).MatchString(url) {
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+ hostInfo.Proxy = true
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+ }
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+ if regexp.MustCompile(`[\?&]nat=1`).MatchString(url) {
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+ hostInfo.Nat = true
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+ }
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+ priorityM := regexp.MustCompile(`[\?&]priority=(-?\d+)`).FindStringSubmatch(url)
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+ if priorityM != nil {
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+ priority, err := strconv.Atoi(priorityM[1])
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+ if err != nil {
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+ return nil, err
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+ }
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+ hostInfo.Priority = int16(priority)
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+ }
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+ return hostInfo, nil
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+}
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+
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+// 只输出客户端要连接的信息
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+func (h *HostInfo) Url() string {
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+ if h == nil {
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+ // 避免空出错
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+ return ""
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+ }
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+ var b bytes.Buffer
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+ fmt.Fprintf(&b, "%s%d://", h.Proto, h.Version)
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+ if h.Hash != "" {
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+ b.WriteString(h.Hash)
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+ b.WriteString("@")
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+ }
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+ if strings.Contains(h.Host, ":") {
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+ // ipv6
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+ b.WriteString("[")
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+ b.WriteString(h.Host)
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+ b.WriteString("]")
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+ } else {
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+ b.WriteString(h.Host)
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+ }
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+ if h.Port > 0 {
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+ fmt.Fprintf(&b, ":%d", h.Port)
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+ }
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+ if h.Path != "" {
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+ b.WriteString(h.Path)
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+ }
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+ param := make([]string, 0)
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+ if h.Proxy {
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+ param = append(param, "proxy=1")
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+ }
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+ if h.Nat {
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+ param = append(param, "nat=1")
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+ }
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+ if h.Priority != 0 {
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+ param = append(param, fmt.Sprintf("priority=%d", h.Priority))
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+ }
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+ if len(param) > 0 {
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+ b.WriteString("?")
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+ b.WriteString(strings.Join(param, "&"))
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+ }
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+ return b.String()
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+}
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+
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+// 输出代表一个节点的关键信息
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+func (h *HostInfo) Key() string {
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+ if h == nil {
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+ // 避免空出错
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+ return ""
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+ }
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+ return fmt.Sprintf("%s%d://%s:%d%s", h.Proto, h.Version, h.Host, h.Port, h.Path)
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+}
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