func renderTemplate(webContext *web.Context, template string, action string, context interface{}, statusCode int) {
webContext.WriteHeader(statusCode)
err := templates[template].ExecuteTemplate(webContext, action+".html", context)
if err != nil {
log.Println("[ERROR] renderTemplate: ", err)
webContext.Abort(500, "Unable to process request.")
}
}
func S3GetHandler(ctx *web.Context, key string) (ret string) {
val := FakeS3[key]
if val == "" {
ctx.Abort(404, "Not Found")
return
} else if val == "FAIL" {
ctx.Redirect(301, "htttttttp://idon'twork")
return
} else {
return val
}
}
// Upsert an item in the datastore.
func upsertItem(ctx *web.Context, key string) string {
value := ctx.Params["value"]
if value == "" {
ctx.Abort(400, "Item creation is missing a value")
return ""
}
// insert the item
item := datastore.NewItem(key, value)
ds.InsertItem(item)
return "created " + key
}
// A Flatpage view. Attach it via web.Get wherever you want flatpages to be available
func Flatpage(ctx *web.Context, url string) string {
p := GetPage(url)
if p == nil {
ctx.Abort(404, "Page not found")
return ""
}
return template.Render("base.mandira", M{
"body": p.ContentRendered,
"title": "jmoiron.net",
"description": "Blog and assorted media from Jason Moiron.",
})
}
// documentStream handles websocket requests from the client for a particular document
func documentStream(ctx *web.Context, documentId string) {
w := ctx.ResponseWriter
r := ctx.Request
if r.Header.Get("Origin") != "http://"+r.Host {
ctx.Abort(403, "Origin not allowed")
// http.Error(w, "Origin not allowed", 403)
return
}
ws, err := websocket.Upgrade(w, r.Header, nil, 1024, 1024)
if _, ok := err.(websocket.HandshakeError); ok {
ctx.Abort(400, "Not a websocket handshake")
return
} else if err != nil {
log.Println(err)
return
}
redis_conn, _ := hub.GetRedis()
defer redis_conn.Close()
s, err := redis.String(redis_conn.Do("GET", documentId))
//make new document at that stringId
if err != nil {
doc := document.NewDoc(documentId)
document_hubs[doc.Name] = hub.DocumentHub{
Document: doc,
Broadcast: make(chan hub.Message),
Register: make(chan *hub.DocumentConnection),
Unregister: make(chan *hub.DocumentConnection),
Connections: make(map[*hub.DocumentConnection]bool),
}
h := document_hubs[doc.Name]
go h.Run()
json_bytes, _ := json.Marshal(doc)
redis_conn.Do("SET", documentId, string(json_bytes))
c := &hub.DocumentConnection{Send: make(chan hub.Message, 256), Ws: ws, H: document_hubs[doc.Name]}
document_hubs[doc.Name].Register <- c
mainHub.Broadcast <- json_bytes
go c.WritePump()
c.ReadPump()
} else {
var doc document.Document
fmt.Println(s)
err := json.Unmarshal([]byte(s), &doc)
if err != nil {
fmt.Println("Error:", err, s)
}
c := &hub.DocumentConnection{Send: make(chan hub.Message, 256), Ws: ws, H: document_hubs[doc.Name]}
document_hubs[doc.Name].Register <- c
go c.WritePump()
c.ReadPump()
}
}
func uploader(ctx *web.Context, key string) {
updateRemoteAddr(ctx)
if _, ok := uploadRequests[key]; ok {
// key exists
ctx.Forbidden()
return
}
wait := make(chan string)
defer delete(uploadRequests, key)
uploadRequests[key] = uploadRequest{ctx.Request, wait}
var result string
select {
case result = <-wait:
case <-time.After(WAIT_CLIENT_TIMEOUT):
result = "wait client timeout"
}
if result == "connected" {
// wait actual result
result = <-wait
}
var body string
if xrw := ctx.Request.Header.Get("X-Requested-With"); xrw == "XMLHttpRequest" {
body = "{\"result\": \"" + result + "\"}\n"
ctx.SetHeader("Content-Type", "application/json", true)
} else {
tmpl, err := template.New("uploader").Parse(uploadTemplate)
if err != nil {
panic(err)
}
var buf bytes.Buffer
tmpl.Execute(&buf, UploadTemplateValue{result})
body = buf.String()
}
if result == "ok" {
ctx.WriteString(body)
} else {
ctx.Abort(500, body)
ctx.Request.Body.Close()
}
}
func blogDetail(ctx *web.Context, slug string) string {
var post = new(Post)
err := db.Find(post, M{"slug": slug}).One(&post)
if err != nil {
fmt.Println(err)
ctx.Abort(404, "Page not found")
return ""
}
return template.Render("base.mandira", M{
"body": RenderPost(post),
"title": post.Title,
"description": post.Summary})
}
// A Flatpage view. Attach it via web.Get wherever you want flatpages to be available
func Flatpage(ctx *web.Context, url string) string {
p := GetPage(url)
fmt.Printf("Got page %v for url %s\n", p, url)
if p == nil {
ctx.Abort(404, "Page not found")
return ""
}
return template.Render("base.mandira", M{
"body": p.ContentRendered,
"title": "Jamil Seaidoun",
"description": "Blog and assorted media from Jamil Seaidoun.",
})
}
/**
* Handles request for section
*/
func handlePaginatedSection(ctx *web.Context, section string, page string) string {
config, err := getConfig()
if err != nil {
ctx.Abort(500, "Configuration error.")
return ""
}
tpl := pongo.Must(pongo.FromFile(config.TemplateFolder+"/template.html", nil))
var content, output string
p, _ := strconv.Atoi(page)
output, err = getAbstracts(section, p, &config)
if err != nil {
ctx.Abort(404, "Page not found. Could not load abstracts")
return ""
}
content = string(blackfriday.MarkdownCommon([]byte(output)))
menu, err := getMenu(&config)
if err != nil {
ctx.Abort(501, "Could not load menu")
return ""
}
var response *string
response, err = tpl.Execute(&pongo.Context{"content": content, "menu": menu,
"currentMenu": menu.GetCurrent(section)})
if err != nil {
ctx.Abort(501, "")
return err.Error()
}
return *response
}
// Wrapper for handling paginated section when no section is given
func handleSection(ctx *web.Context, section string) string {
if len(section) == 0 {
config, err := getConfig()
if err != nil {
ctx.Abort(500, "Configuration error.")
return ""
}
menu, err := getMenu(&config)
if err != nil {
ctx.Abort(501, "Could not load menu")
return ""
}
return handlePaginatedSection(ctx, menu[0].Section, "1")
}
return handlePaginatedSection(ctx, section, "1")
}
// Returns a key or abort with an error if it doesn't exist or the item
// has gone mainstream.
func getItem(ctx *web.Context, key string) string {
item, err := ds.GetItem(key)
if err != nil {
var errorStatus int
if err.Error() == datastore.ACCESS_MISSING {
errorStatus = 404
} else {
errorStatus = 403
}
ctx.Abort(errorStatus, err.Error())
return ""
}
return item.Value
}
func (c *Controller) PublishPost(ctx *web.Context) {
if !c.sessionManager.LoggedIn(ctx) {
ctx.Redirect(303, "/login")
return
}
file, head, err := ctx.Request.FormFile("publishFile")
if err != nil {
ctx.Abort(405, "error, post without a file")
return
}
saveFile, err := os.Create("articles/" + head.Filename)
defer saveFile.Close()
io.Copy(saveFile, file)
file.Close()
ctx.Redirect(303, "/publish")
}
func deleteDocument(ctx *web.Context, documentId string) {
redis_conn, _ := hub.GetRedis()
defer redis_conn.Close()
//make new document at that stringId
if _, ok := document_hubs[documentId]; ok {
h := document_hubs[documentId]
var buf bytes.Buffer
doc := document.Document{Name: h.Document.Name, Title: h.Document.Title, Version: h.Document.Version}
redis_conn.Do("DEL", documentId)
json_bytes, _ := json.Marshal(doc)
h.Broadcast <- hub.Message{M: json_bytes}
buf.Write(json_bytes)
io.Copy(ctx, &buf)
} else {
ctx.Abort(404, "Document does not exist")
return
}
}
// serverWs handles websocket requests from the client.
func serveWs(ctx *web.Context) {
w := ctx.ResponseWriter
r := ctx.Request
if r.Header.Get("Origin") != "http://"+r.Host {
ctx.Abort(403, "Origin not allowed")
// http.Error(w, "Origin not allowed", 403)
return
}
ws, err := websocket.Upgrade(w, r.Header, nil, 1024, 1024)
if _, ok := err.(websocket.HandshakeError); ok {
ctx.Abort(400, "Not a websocket handshake")
return
} else if err != nil {
log.Println(err)
return
}
c := &hub.Connection{Send: make(chan []byte, 256), Ws: ws, H: mainHub}
mainHub.Register <- c
go c.WritePump()
c.ReadPump()
}
func (server *Server) PostPaths(ctx *web.Context) string {
var input struct {
Paths []geotypes.NodeEdge
Country string
SpeedProfile int
}
var (
computed []geotypes.Path
)
if err := json.NewDecoder(ctx.Request.Body).Decode(&input); err != nil {
content, _ := ioutil.ReadAll(ctx.Request.Body)
ctx.Abort(400, "Couldn't parse JSON: "+err.Error()+" in '"+string(content)+"'")
return ""
} else {
var err error
computed, err = server.Via.CalculatePaths(input.Paths, input.Country, input.SpeedProfile)
if err != nil {
ctx.Abort(422, "Couldn't resolve addresses: "+err.Error())
return ""
}
}
res, err := json.Marshal(computed)
if err != nil {
ctx.Abort(500, "Couldn't serialize paths: "+err.Error())
return ""
}
ctx.Header().Set("Access-Control-Allow-Origin", "*")
ctx.ContentType("application/json")
return string(res)
}
func downloader(ctx *web.Context, key string) {
updateRemoteAddr(ctx)
up, ok := uploadRequests[key]
if !ok {
ctx.NotFound("key doesn't exist")
return
}
up.wait <- "connected"
result := "ng"
defer func() { up.wait <- result }()
mr, err := up.request.MultipartReader()
if err != nil {
ctx.Abort(500, err.Error())
return
}
p, err := mr.NextPart()
if p.FormName() == "size" {
fileSize, err := ioutil.ReadAll(p)
if err == nil {
fileSize, err := strconv.ParseInt(string(fileSize), 10, 64)
if err == nil && fileSize >= 0 {
ctx.SetHeader("Content-Length", strconv.FormatInt(fileSize, 10), true)
}
}
}
p, err = mr.NextPart()
if err != nil {
ctx.Abort(500, err.Error())
return
}
if p.FormName() != "file" {
ctx.Abort(500, "invalid POST (upload) request")
return
}
if contentType := p.Header.Get("Content-Type"); contentType != "" {
ctx.SetHeader("Content-Type", contentType, true)
}
ctx.SetHeader("Content-Disposition", "attachment; filename="+p.FileName(), true)
_, err = io.Copy(ctx, p)
if err == nil {
result = "ok"
} else {
// XXX: may expose too many infomation (such as client IP address)
//result = err.Error()
}
}
func setDocumentTitle(ctx *web.Context, documentId string) {
redis_conn, _ := hub.GetRedis()
defer redis_conn.Close()
//make new document at that stringId
if _, ok := document_hubs[documentId]; ok {
body, _ := ioutil.ReadAll(ctx.Request.Body)
var ndoc document.Document
json.Unmarshal(body, &ndoc)
h := document_hubs[documentId]
h.Document.Title = ndoc.Title
var buf bytes.Buffer
doc := document.Document{Name: h.Document.Name, Title: h.Document.Title, Version: h.Document.Version}
h.Save(redis_conn)
doc.ClientId = ndoc.ClientId
json_bytes, _ := json.Marshal(doc)
mainHub.Broadcast <- json_bytes
buf.Write(json_bytes)
io.Copy(ctx, &buf)
} else {
ctx.Abort(404, "Document does not exist")
return
}
}
func APIErrorResponse(ctx *web.Context, message string, status int) {
resp_text := APIResponse(ctx, map[string]interface{}{"error": message})
ctx.Abort(status, resp_text)
}
// Starts a computation, validates the matrix in POST.
// If matrix data is missing, returns 400 Bad Request.
// If on the other hand matrix is data is not missing,
// but makes no sense, it returns 422 Unprocessable Entity.
func (server *Server) PostMatrix(ctx *web.Context) {
defer runtime.GC()
// Parse params
var paramBlob struct {
Matrix []int `json:"matrix"`
Country string `json:"country"`
SpeedProfile float64 `json:"speed_profile"`
}
if err := json.NewDecoder(ctx.Request.Body).Decode(¶mBlob); err != nil {
ctx.Abort(400, err.Error())
return
}
data := paramBlob.Matrix
country := strings.ToLower(paramBlob.Country)
sp := int(paramBlob.SpeedProfile)
ok := len(data) > 0 && country != "" && sp > 0
if ok {
// Sanitize speed profile.
if !contains(sp, allowedSpeeds) {
msg := fmt.Sprintf("speed profile '%d' makes no sense, must be one of %s", sp, fmt.Sprint(allowedSpeeds))
ctx.Abort(422, msg)
return
}
// Sanitize country.
if _, ok := server.AllowedCountries[country]; !ok {
countries := ""
for k := range server.AllowedCountries {
countries += k + " "
}
ctx.Abort(422, "country "+country+" not allowed, must be one of: "+countries)
return
}
matrix, err := server.Via.ComputeMatrix(data, country, sp)
if err != nil {
viaErr.NewError(viaErr.ErrMatrixComputation, err.Error()).WriteTo(ctx.ResponseWriter)
return
}
result := Result{
Progress: "complete",
Matrix: matrix,
SpeedProfile: sp,
}
ctx.WriteHeader(200)
ctx.ContentType("json")
if err := json.NewEncoder(ctx.ResponseWriter).Encode(result); err != nil {
viaErr.NewError(viaErr.ErrMatrixComputation, "Failed to encode results to response writer.").WriteTo(ctx.ResponseWriter)
return
}
} else {
body, _ := ioutil.ReadAll(ctx.Request.Body)
ctx.Abort(400, "Missing or invalid matrix data, speed profile, or country. You sent: "+string(body))
return
}
}
