wide/editor/formatter.go

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// Copyright (c) 2014, B3log
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
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package editor
import (
"encoding/json"
"net/http"
"os"
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"os/exec"
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"runtime"
"strings"
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"github.com/b3log/wide/conf"
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"github.com/b3log/wide/session"
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"github.com/b3log/wide/util"
"github.com/golang/glog"
)
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// GoFmtHandler handles request of formatting Go source code.
//
// This function will select a format tooll based on user's configuration:
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// 1. gofmt
// 2. goimports
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func GoFmtHandler(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
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session, _ := session.HTTPSession.Get(r, "wide-session")
username := session.Values["username"].(string)
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var args map[string]interface{}
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if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
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glog.Error(err)
data["succ"] = false
return
}
filePath := args["file"].(string)
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apiPath := runtime.GOROOT() + conf.PathSeparator + "src" + conf.PathSeparator + "pkg"
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if strings.HasPrefix(filePath, apiPath) { // if it is Go API source code
// ignore it
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return
}
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fout, err := os.Create(filePath)
if nil != err {
glog.Error(err)
data["succ"] = false
return
}
code := args["code"].(string)
fout.WriteString(code)
if err := fout.Close(); nil != err {
glog.Error(err)
data["succ"] = false
return
}
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fmt := conf.Wide.GetGoFmt(username)
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argv := []string{filePath}
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cmd := exec.Command(fmt, argv...)
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bytes, _ := cmd.Output()
output := string(bytes)
if "" == output {
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// format error, returns the original content
data["succ"] = true
data["code"] = code
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return
}
code = string(output)
data["code"] = code
fout, err = os.Create(filePath)
fout.WriteString(code)
if err := fout.Close(); nil != err {
glog.Error(err)
data["succ"] = false
return
}
}