Merge pull request #197 from writeas/markdown-API

add basic API endpoint for rendering markdown

Ref T519

postrender.go

@@ -11,9 +11,11 @@
 package writefreely
 
 import (
+	"encoding/json"
 	"fmt"
 	"html"
 	"html/template"
+	"net/http"
 	"regexp"
 	"strings"
 	"unicode"
@@ -21,7 +23,9 @@ import (
 
 	"github.com/microcosm-cc/bluemonday"
 	stripmd "github.com/writeas/go-strip-markdown"
+	"github.com/writeas/impart"
 	blackfriday "github.com/writeas/saturday"
+	"github.com/writeas/web-core/log"
 	"github.com/writeas/web-core/stringmanip"
 	"github.com/writeas/writefreely/config"
 	"github.com/writeas/writefreely/parse"
@@ -234,3 +238,31 @@ func shortPostDescription(content string) string {
 	}
 	return strings.TrimSpace(fmt.Sprintf(fmtStr, strings.Replace(stringmanip.Substring(content, 0, maxLen-truncation), "\n", " ", -1)))
 }
+
+func handleRenderMarkdown(app *App, w http.ResponseWriter, r *http.Request) error {
+	if !IsJSON(r) {
+		return impart.HTTPError{Status: http.StatusUnsupportedMediaType, Message: "Markdown API only supports JSON requests"}
+	}
+
+	in := struct {
+		BaseURL string `json:"base_url"`
+		RawBody string `json:"raw_body"`
+	}{
+		BaseURL: "",
+	}
+
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&in)
+	if err != nil {
+		log.Error("Couldn't parse markdown JSON request: %v", err)
+		return ErrBadJSON
+	}
+
+	out := struct {
+		Body string `json:"body"`
+	}{
+		Body: applyMarkdown([]byte(in.RawBody), in.BaseURL, app.cfg),
+	}
+
+	return impart.WriteSuccess(w, out, http.StatusOK)
+}

routes.go

@@ -113,6 +113,8 @@ func InitRoutes(apper Apper, r *mux.Router) *mux.Router {
 	// Sign up validation
 	write.HandleFunc("/api/alias", handler.All(handleUsernameCheck)).Methods("POST")
 
+	write.HandleFunc("/api/markdown", handler.All(handleRenderMarkdown)).Methods("POST")
+
 	// Handle collections
 	write.HandleFunc("/api/collections", handler.All(newCollection)).Methods("POST")
 	apiColls := write.PathPrefix("/api/collections/").Subrouter()