package main import ( "crypto/sha256" "fmt" "io/ioutil" "log" "net/http" "os" "github.com/gorilla/mux" ) // handles "/" func indexHandler(w http.ResponseWriter, r *http.Request) { // Stat the index template to get the mod time var etag string if indextmpl, err := os.Stat("assets/tmpl/index.html"); err != nil { log.Printf("Couldn't stat index template for ETag ... %v\n", err) } else { etag = fmt.Sprintf("%x", sha256.Sum256([]byte(indextmpl.ModTime().String()))) } // Take the hex-encoded sha256 sum of the index template's mod time // to send as an ETag. If an error occured when grabbing the file info, // the ETag will be empty. w.Header().Set("ETag", "\""+etag+"\"") w.Header().Set("Content-Type", htmlutf8) // Pass the confObj.Instance data to the template, // then send it to the client. err := tmpls.ExecuteTemplate(w, "index.html", confObj.Instance) if err != nil { log500(w, r, err) return } log200(r) } // handles "/api" func apiBaseHandler(w http.ResponseWriter, r *http.Request) { indexHandler(w, r) } // handles "/api/plain" // maybe add json/xml support later func apiFormatHandler(w http.ResponseWriter, r *http.Request) { indexHandler(w, r) } // handles "/api/plain/(users|mentions|tweets)" func apiEndpointHandler(w http.ResponseWriter, r *http.Request) { err := r.ParseForm() if err != nil { log500(w, r, err) return } // if there's a query, execute it if r.FormValue("q") != "" || r.FormValue("url") != "" { err := apiEndpointQuery(w, r) if err != nil { log500(w, r, err) return } log200(r) return } // if there's no query, return everything in // registry for a given endpoint var out []string if r.URL.Path == "/api/plain/users" { out, err = twtxtCache.QueryUser("") } else if r.URL.Path == "/api/plain/mentions" { out, err = twtxtCache.QueryInStatus(".txt>") } else { out, err = twtxtCache.QueryAllStatuses() } if err != nil { log500(w, r, err) return } data := parseQueryOut(out) w.Header().Set("Content-Type", txtutf8) _, err = w.Write(data) if err != nil { log500(w, r, err) return } log200(r) } // handles POST for "/api/plain/users" func apiEndpointPOSTHandler(w http.ResponseWriter, r *http.Request) { vars := mux.Vars(r) format := vars["format"] endpoint := vars["endpoint"] w.Header().Set("Content-Type", htmlutf8) _, err := w.Write([]byte(format + "/" + endpoint)) if err != nil { log500(w, r, err) return } log200(r) } // handles "/api/plain/tags" func apiTagsBaseHandler(w http.ResponseWriter, r *http.Request) { out, err := twtxtCache.QueryInStatus("#") if err != nil { log500(w, r, err) return } data := parseQueryOut(out) w.Header().Set("Content-Type", txtutf8) _, err = w.Write(data) if err != nil { log500(w, r, err) return } log200(r) } // handles "/api/plain/tags/[a-zA-Z0-9]+" func apiTagsHandler(w http.ResponseWriter, r *http.Request) { vars := mux.Vars(r) tags := vars["tags"] out, err := twtxtCache.QueryInStatus(tags) if err != nil { log500(w, r, err) return } data := parseQueryOut(out) w.Header().Set("Content-Type", txtutf8) _, err = w.Write(data) if err != nil { log500(w, r, err) return } log200(r) } // Serving the stylesheet virtually because // files aren't served directly. func cssHandler(w http.ResponseWriter, r *http.Request) { // read the raw bytes of the stylesheet css, err := ioutil.ReadFile("assets/style.css") if err != nil { if os.IsNotExist(err) { log404(w, r, err) return } log500(w, r, err) return } // Get the mod time for the etag header stat, err := os.Stat("assets/style.css") if err != nil { log.Printf("Couldn't stat CSS file to send ETag header: %v\n", err) } // Sending the sha256 sum of the modtime in hexadecimal for the ETag header etag := fmt.Sprintf("%x", sha256.Sum256([]byte(stat.ModTime().String()))) w.Header().Set("ETag", "\""+etag+"\"") w.Header().Set("Content-Type", cssutf8) n, err := w.Write(css) if err != nil || n == 0 { log500(w, r, err) return } log200(r) }