Here's how I did it!
My requirements were:
- Serve up the contents of a file based on a route for example \Customers would serve a file in the \Customers directory
- Allow Cross-origin resource sharing and/or JSONP
- Allow me to change the JSON being served without having to restart anything
I decided to write the server in Go Lang since it's fun to scaffold up http web services with and the resultant utility will be cross platform so I can tinker away on my Mac with few issues. I've used Martini framework to get up and running quickly.
So the file directory will contain the files that I want to serve up as per:
The code to scan the file directory for the files is straightforward:
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| func (routes *RoutesImpl) Load() { | |
| OrgPath := "./" | |
| Recurse := true | |
| walkFn := func(path string, info os.FileInfo, err error) error { | |
| stat, err := os.Stat(path) | |
| if err != nil { | |
| return err | |
| } | |
| if stat.IsDir() && path != OrgPath && !Recurse { | |
| return filepath.SkipDir | |
| } | |
| if err != nil { | |
| return err | |
| } | |
| if stat.IsDir() { | |
| routes.routelist = append(routes.routelist, Route{path}) | |
| } | |
| return nil | |
| } | |
| filepath.Walk(OrgPath, walkFn) | |
| } |
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| func ParseRoute(service *ServiceImpl) martini.Handler { | |
| return func(w http.ResponseWriter, r *http.Request) { | |
| w.Header().Set("Access-Control-Allow-Origin", "*") | |
| w.Header().Set("Content-type", "application/json") | |
| for _, b := range service.routes { | |
| path := strings.TrimPrefix(r.URL.Path, "/") | |
| if b.path == path { | |
| if r.Method == "GET" { | |
| fmt.Println(r.URL.RawQuery) | |
| m, _ := url.ParseQuery(r.URL.RawQuery) | |
| // need to wrap the file in a function if jsonp | |
| content, _ := ioutil.ReadFile(b.path + "/GET") | |
| // check to see if this is a jsonp call | |
| if value, ok := m["callback"]; ok { | |
| s := fmt.Sprintf("%s(%s)", value[0], string(content)) | |
| io.WriteString(w, s) | |
| } else { | |
| io.WriteString(w, string(content)) | |
| } | |
| } | |
| } | |
| } | |
| fmt.Println(r.URL.Path) | |
| r.URL.Path = "" | |
| } | |
| } |
So now when we run the servicestub application:
And if we choose a specific item:
Now to write some JavaScript!
Code here:
