| 1 | // Copyright 2012 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package main |
| 6 | |
| 7 | import ( |
| 8 | "bytes" |
| 9 | "fmt" |
| 10 | "io/ioutil" |
| 11 | "net/http" |
| 12 | "net/url" |
| 13 | "path/filepath" |
| 14 | "runtime" |
| 15 | "time" |
| 16 | |
| 17 | "golang.org/x/tools/godoc/static" |
| 18 | "golang.org/x/tools/playground/socket" |
| 19 | "golang.org/x/tools/present" |
| 20 | |
| 21 | // This will register a handler at /compile that will proxy to the |
| 22 | // respective endpoints at play.golang.org. This allows the frontend to call |
| 23 | // these endpoints without needing cross-origin request sharing (CORS). |
| 24 | // Note that this is imported regardless of whether the endpoints are used or |
| 25 | // not (in the case of a local socket connection, they are not called). |
| 26 | _ "golang.org/x/tools/playground" |
| 27 | ) |
| 28 | |
| 29 | var scripts = []string{"jquery.js", "jquery-ui.js", "playground.js", "play.js"} |
| 30 | |
| 31 | // playScript registers an HTTP handler at /play.js that serves all the |
| 32 | // scripts specified by the variable above, and appends a line that |
| 33 | // initializes the playground with the specified transport. |
| 34 | func playScript(root, transport string) { |
| 35 | modTime := time.Now() |
| 36 | var buf bytes.Buffer |
| 37 | for _, p := range scripts { |
| 38 | if s, ok := static.Files[p]; ok { |
| 39 | buf.WriteString(s) |
| 40 | continue |
| 41 | } |
| 42 | b, err := ioutil.ReadFile(filepath.Join(root, "static", p)) |
| 43 | if err != nil { |
| 44 | panic(err) |
| 45 | } |
| 46 | buf.Write(b) |
| 47 | } |
| 48 | fmt.Fprintf(&buf, "\ninitPlayground(new %v());\n", transport) |
| 49 | b := buf.Bytes() |
| 50 | http.HandleFunc("/play.js", func(w http.ResponseWriter, r *http.Request) { |
| 51 | w.Header().Set("Content-type", "application/javascript") |
| 52 | http.ServeContent(w, r, "", modTime, bytes.NewReader(b)) |
| 53 | }) |
| 54 | } |
| 55 | |
| 56 | func initPlayground(basepath string, origin *url.URL) { |
| 57 | if !present.PlayEnabled { |
| 58 | return |
| 59 | } |
| 60 | if *usePlayground { |
| 61 | playScript(basepath, "HTTPTransport") |
| 62 | return |
| 63 | } |
| 64 | |
| 65 | if *nativeClient { |
| 66 | // When specifying nativeClient, non-Go code cannot be executed |
| 67 | // because the NaCl setup doesn't support doing so. |
| 68 | socket.RunScripts = false |
| 69 | socket.Environ = func() []string { |
| 70 | if runtime.GOARCH == "amd64" { |
| 71 | return environ("GOOS=nacl", "GOARCH=amd64p32") |
| 72 | } |
| 73 | return environ("GOOS=nacl") |
| 74 | } |
| 75 | } |
| 76 | playScript(basepath, "SocketTransport") |
| 77 | http.Handle("/socket", socket.NewHandler(origin)) |
| 78 | } |
| 79 | |
| 80 | func playable(c present.Code) bool { |
| 81 | play := present.PlayEnabled && c.Play |
| 82 | |
| 83 | // Restrict playable files to only Go source files when using play.golang.org, |
| 84 | // since there is no method to execute shell scripts there. |
| 85 | if *usePlayground { |
| 86 | return play && c.Ext == ".go" |
| 87 | } |
| 88 | return play |
| 89 | } |
| 90 |
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