focalboard/server/api/api.go

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package api
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import (
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"context"
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"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"path/filepath"
"strings"
"github.com/gorilla/mux"
"github.com/mattermost/mattermost-octo-tasks/server/app"
"github.com/mattermost/mattermost-octo-tasks/server/model"
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)
// ----------------------------------------------------------------------------------------------------
// REST APIs
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type API struct {
appBuilder func() *app.App
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}
func NewAPI(appBuilder func() *app.App) *API {
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return &API{appBuilder: appBuilder}
}
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func (a *API) app() *app.App {
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return a.appBuilder()
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}
func (a *API) RegisterRoutes(r *mux.Router) {
r.HandleFunc("/api/v1/blocks", a.handleGetBlocks).Methods("GET")
r.HandleFunc("/api/v1/blocks", a.handlePostBlocks).Methods("POST")
r.HandleFunc("/api/v1/blocks/{blockID}", a.handleDeleteBlock).Methods("DELETE")
r.HandleFunc("/api/v1/blocks/{blockID}/subtree", a.handleGetSubTree).Methods("GET")
r.HandleFunc("/api/v1/files", a.handleUploadFile).Methods("POST")
r.HandleFunc("/files/{filename}", a.handleServeFile).Methods("GET")
r.HandleFunc("/api/v1/blocks/export", a.handleExport).Methods("GET")
r.HandleFunc("/api/v1/blocks/import", a.handleImport).Methods("POST")
}
func (a *API) handleGetBlocks(w http.ResponseWriter, r *http.Request) {
query := r.URL.Query()
parentID := query.Get("parent_id")
blockType := query.Get("type")
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blocks, err := a.app().GetBlocks(parentID, blockType)
if err != nil {
log.Printf(`ERROR GetBlocks: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
log.Printf("GetBlocks parentID: %s, type: %s, %d result(s)", parentID, blockType, len(blocks))
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json, err := json.Marshal(blocks)
if err != nil {
log.Printf(`ERROR json.Marshal: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
jsonBytesResponse(w, http.StatusOK, json)
}
func (a *API) handlePostBlocks(w http.ResponseWriter, r *http.Request) {
requestBody, err := ioutil.ReadAll(r.Body)
if err != nil {
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
// Catch panics from parse errors, etc.
defer func() {
if r := recover(); r != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
}()
var blocks []model.Block
err = json.Unmarshal(requestBody, &blocks)
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if err != nil {
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
for _, block := range blocks {
// Error checking
if len(block.Type) < 1 {
errorData := map[string]string{"description": "missing type", "id": block.ID}
errorResponse(w, http.StatusBadRequest, errorData)
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return
}
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if block.CreateAt < 1 {
errorData := map[string]string{"description": "invalid createAt", "id": block.ID}
errorResponse(w, http.StatusBadRequest, errorData)
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return
}
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if block.UpdateAt < 1 {
errorData := map[string]string{"description": "invalid UpdateAt", "id": block.ID}
errorResponse(w, http.StatusBadRequest, errorData)
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return
}
}
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err = a.app().InsertBlocks(blocks)
if err != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
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log.Printf("POST Blocks %d block(s)", len(blocks))
jsonStringResponse(w, http.StatusOK, "{}")
}
func (a *API) handleDeleteBlock(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
blockID := vars["blockID"]
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err := a.app().DeleteBlock(blockID)
if err != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
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}
log.Printf("DELETE Block %s", blockID)
jsonStringResponse(w, http.StatusOK, "{}")
}
func (a *API) handleGetSubTree(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
blockID := vars["blockID"]
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blocks, err := a.app().GetSubTree(blockID)
if err != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
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log.Printf("GetSubTree blockID: %s, %d result(s)", blockID, len(blocks))
json, err := json.Marshal(blocks)
if err != nil {
log.Printf(`ERROR json.Marshal: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
jsonBytesResponse(w, http.StatusOK, json)
}
func (a *API) handleExport(w http.ResponseWriter, r *http.Request) {
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blocks, err := a.app().GetAllBlocks()
if err != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
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log.Printf("EXPORT Blocks, %d result(s)", len(blocks))
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json, err := json.Marshal(blocks)
if err != nil {
log.Printf(`ERROR json.Marshal: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
jsonBytesResponse(w, http.StatusOK, json)
}
func (a *API) handleImport(w http.ResponseWriter, r *http.Request) {
requestBody, err := ioutil.ReadAll(r.Body)
if err != nil {
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
// Catch panics from parse errors, etc.
defer func() {
if r := recover(); r != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
}()
var blocks []model.Block
err = json.Unmarshal(requestBody, &blocks)
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if err != nil {
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
for _, block := range blocks {
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err := a.app().InsertBlock(block)
if err != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, http.StatusInternalServerError, nil)
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return
}
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}
log.Printf("IMPORT Blocks %d block(s)", len(blocks))
jsonStringResponse(w, http.StatusOK, "{}")
}
// File upload
func (a *API) handleServeFile(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
filename := vars["filename"]
contentType := "image/jpg"
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fileExtension := strings.ToLower(filepath.Ext(filename))
if fileExtension == "png" {
contentType = "image/png"
}
w.Header().Set("Content-Type", contentType)
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filePath := a.app().GetFilePath(filename)
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http.ServeFile(w, r, filePath)
}
func (a *API) handleUploadFile(w http.ResponseWriter, r *http.Request) {
fmt.Println(`handleUploadFile`)
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file, handle, err := r.FormFile("file")
if err != nil {
fmt.Fprintf(w, "%v", err)
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return
}
defer file.Close()
log.Printf(`handleUploadFile, filename: %s`, handle.Filename)
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url, err := a.app().SaveFile(file, handle.Filename)
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if err != nil {
jsonStringResponse(w, http.StatusInternalServerError, `{}`)
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return
}
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log.Printf(`saveFile, url: %s`, url)
json := fmt.Sprintf(`{ "url": "%s" }`, url)
jsonStringResponse(w, http.StatusOK, json)
}
// Response helpers
func jsonStringResponse(w http.ResponseWriter, code int, message string) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(code)
fmt.Fprint(w, message)
}
func jsonBytesResponse(w http.ResponseWriter, code int, json []byte) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(code)
w.Write(json)
}
func errorResponse(w http.ResponseWriter, code int, message map[string]string) {
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log.Printf("%d ERROR", code)
data, err := json.Marshal(message)
if err != nil {
data = []byte("{}")
}
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w.WriteHeader(code)
fmt.Fprint(w, data)
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}
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func addUserID(rw http.ResponseWriter, req *http.Request, next http.Handler) {
ctx := context.WithValue(req.Context(), "userid", req.Header.Get("userid"))
req = req.WithContext(ctx)
next.ServeHTTP(rw, req)
}