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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,16 +1,16 @@ | ||
| module gateway | ||
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| go 1.19 | ||
| go 1.21 | ||
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| require ( | ||
| github.com/creasty/defaults v1.7.0 | ||
| github.com/sirupsen/logrus v1.9.3 | ||
| github.com/vibrantbyte/go-antpath v1.1.1 | ||
| gopkg.in/yaml.v2 v2.4.0 | ||
| ) | ||
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| require ( | ||
| github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect | ||
| github.com/sirupsen/logrus v1.9.3 // indirect | ||
| github.com/vibrantbyte/go-antpath v1.1.1 // indirect | ||
| golang.org/x/sys v0.10.0 // indirect | ||
| gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| package util | ||
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| import ( | ||
| "net/http" | ||
| "net/http/httputil" | ||
| "net/url" | ||
| "strings" | ||
| ) | ||
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| // ServeReverseProxy Serve a reverse proxy for a given url | ||
| func ServeReverseProxy(target string, res http.ResponseWriter, req *http.Request) { | ||
| // parse the url | ||
| remote, _ := url.Parse(target) | ||
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| // create the reverse proxy | ||
| proxy := httputil.NewSingleHostReverseProxy(remote) | ||
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| proxy.Director = func(request *http.Request) { | ||
| targetQuery := remote.RawQuery | ||
| request.URL.Scheme = remote.Scheme | ||
| request.URL.Host = remote.Host | ||
| request.Host = remote.Host // todo 这个是关键 | ||
| request.URL.Path, request.URL.RawPath = joinURLPath(remote, request.URL) | ||
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| if targetQuery == "" || req.URL.RawQuery == "" { | ||
| req.URL.RawQuery = targetQuery + req.URL.RawQuery | ||
| } else { | ||
| req.URL.RawQuery = targetQuery + "&" + req.URL.RawQuery | ||
| } | ||
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| if targetQuery == "" || request.URL.RawQuery == "" { | ||
| request.URL.RawQuery = targetQuery + request.URL.RawQuery | ||
| } else { | ||
| request.URL.RawQuery = targetQuery + "&" + request.URL.RawQuery | ||
| } | ||
| } | ||
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| // 修改响应头 | ||
| proxy.ModifyResponse = func(response *http.Response) error { | ||
| response.Header.Add("Access-Control-Allow-Origin", "*") | ||
| return nil | ||
| } | ||
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| // Note that ServeHttp is non blocking and uses a go routine under the hood | ||
| proxy.ServeHTTP(res, req) | ||
| } | ||
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| // go sdk 源码 | ||
| func singleJoiningSlash(a, b string) string { | ||
| aslash := strings.HasSuffix(a, "/") | ||
| bslash := strings.HasPrefix(b, "/") | ||
| switch { | ||
| case aslash && bslash: | ||
| return a + b[1:] | ||
| case !aslash && !bslash: | ||
| return a + "/" + b | ||
| } | ||
| return a + b | ||
| } | ||
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| // go sdk 源码 | ||
| func joinURLPath(a, b *url.URL) (path, rawpath string) { | ||
| if a.RawPath == "" && b.RawPath == "" { | ||
| return singleJoiningSlash(a.Path, b.Path), "" | ||
| } | ||
| // Same as singleJoiningSlash, but uses EscapedPath to determine | ||
| // whether a slash should be added | ||
| apath := a.EscapedPath() | ||
| bpath := b.EscapedPath() | ||
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| aslash := strings.HasSuffix(apath, "/") | ||
| bslash := strings.HasPrefix(bpath, "/") | ||
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| switch { | ||
| case aslash && bslash: | ||
| return a.Path + b.Path[1:], apath + bpath[1:] | ||
| case !aslash && !bslash: | ||
| return a.Path + "/" + b.Path, apath + "/" + bpath | ||
| } | ||
| return a.Path + b.Path, apath + bpath | ||
| } |