// WriteResponseObject writes the status code and response object to the HttpResponseWriter in
// the specified context, in the format best suited based on the request.
//
// Goweb uses the WebCodecService to decide which codec to use when responding
// see http://godoc.org/github.com/stretchrcom/codecs/services#WebCodecService for more information.
//
// This method should be used when the Goweb Standard Response Object does not satisfy the needs of
// the API, but other Respond* methods are recommended.
func (a *GowebAPIResponder) WriteResponseObject(ctx context.Context, status int, responseObject interface{}) error {
service := a.GetCodecService()
acceptHeader := ctx.HttpRequest().Header.Get("Accept")
extension := ctx.FileExtension()
hasCallback := len(ctx.QueryValue("callback")) > 0
codec, codecError := service.GetCodecForResponding(acceptHeader, extension, hasCallback)
if codecError != nil {
return codecError
}
var options map[string]interface{}
// do we need to add some options?
if hasCallback {
options = map[string]interface{}{constants.OptionKeyClientCallback: ctx.QueryValue("callback")}
}
output, marshalErr := codec.Marshal(responseObject, options)
if marshalErr != nil {
return marshalErr
}
// use the HTTP responder to respond
ctx.HttpResponseWriter().Header().Set("Content-Type", codec.ContentType()) // TODO: test me
a.httpResponder.With(ctx, status, output)
return nil
}
// Handle writes the error from the context into the HttpResponseWriter with a
// 500 http.StatusInternalServerError status code.
func (h *DefaultErrorHandler) Handle(ctx context.Context) (stop bool, err error) {
var handlerError HandlerError = ctx.Data().Get(DataKeyForError).(HandlerError)
hostname, _ := os.Hostname()
w := ctx.HttpResponseWriter()
// write the error out
w.Header().Set("Content-Type", "text/html")
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("<!DOCTYPE html><html><head>"))
w.Write([]byte("<style>"))
w.Write([]byte("h1 { font-size: 17px }"))
w.Write([]byte("h1 strong {text-decoration:underline}"))
w.Write([]byte("h2 { background-color: #ffd; padding: 20px }"))
w.Write([]byte("footer { margin-top: 20px; border-top:1px solid black; padding:10px; font-size:0.9em }"))
w.Write([]byte("</style>"))
w.Write([]byte("</head><body>"))
w.Write([]byte(fmt.Sprintf("<h1>Error in <code>%s</code></h1><h2>%s</h2>", handlerError.Handler, handlerError)))
w.Write([]byte(fmt.Sprintf("<h3><code>%s</code> error in Handler <code>%v</code></h3> <code><pre>%s</pre></code>", reflect.TypeOf(handlerError.OriginalError), &handlerError.Handler, handlerError.Handler)))
w.Write([]byte(fmt.Sprintf("on %s", hostname)))
w.Write([]byte("<footer>Learn more about <a href='http://github.com/stretchrcom/goweb' target='_blank'>Goweb</a></footer>"))
w.Write([]byte("</body></html>"))
// responses are actually ignored
return false, nil
}
// Before gets called before any other method.
func (r *ThingsController) Before(ctx context.Context) error {
// set a Things specific header
ctx.HttpResponseWriter().Header().Set("X-Things-Controller", "true")
return nil
}
// With writes a response to the request in the specified context.
func (r *GowebHTTPResponder) With(ctx context.Context, httpStatus int, body []byte) error {
r.WithStatus(ctx, httpStatus)
_, writeErr := ctx.HttpResponseWriter().Write(body)
return writeErr
}
func (r *ThingsController) Create(ctx context.Context) error {
data, dataErr := ctx.RequestData()
if dataErr != nil {
return goweb.API.RespondWithError(ctx, http.StatusInternalServerError, dataErr.Error())
}
dataMap := data.(map[string]interface{})
thing := new(Thing)
thing.Id = dataMap["Id"].(string)
thing.Text = dataMap["Text"].(string)
r.Things = append(r.Things, thing)
return goweb.Respond.WithStatus(ctx, http.StatusCreated)
}
//add error catching here.
func (r *UniversumController) Read(brand string, ctx context.Context) error {
fmt.Println("rest")
query := ctx.HttpRequest().URL.RawQuery
//metric_name := GetQueryValue("name",query)
since_str := GetQueryValue("since", query)
const shortForm = "2006-Jan-02"
since, _ := time.Parse(shortForm, since_str)
until_str := GetQueryValue("until", query)
until, _ := time.Parse(shortForm, until_str)
resolution := "day"
key := GetQueryValue("apikey", query)
fmt.Println("the api key is " + key)
user_id := db.Read("universum", "apikeys", key)
if len(user_id) < 1 {
errObject := "unverified api key"
return goweb.API.RespondWithError(ctx, 500, errObject)
}
if brand == "ranking" {
ranking := new(RankingData)
ranking.Type = brand
ranking.Brands, ranking.Change = GetMetrics(brand, query, since, until, resolution)
return goweb.API.RespondWithData(ctx, ranking)
}
data := new(Data)
data.Brand = brand
data.Metrics, data.TimeStamp = GetMetrics(brand, query, since, until, resolution)
fmt.Println("booyay")
return goweb.API.RespondWithData(ctx, data)
}
// WillHandle checks whether this handler will be used to handle the specified
// request or not.
func (p *PathMatchHandler) WillHandle(c context.Context) (bool, error) {
// check each matcher func
matcherFuncMatches := true
matcherFuncDecisionMade := false
for _, matcherFunc := range p.MatcherFuncs {
decision, matcherFuncErr := matcherFunc(c)
if matcherFuncErr != nil {
return false, matcherFuncErr
}
switch decision {
case NoMatch:
matcherFuncMatches = false
matcherFuncDecisionMade = true
break
case Match:
matcherFuncMatches = true
matcherFuncDecisionMade = true
break
}
if matcherFuncDecisionMade {
break
}
}
// check HTTP methods
var httpMethodMatch bool = false
if len(p.HttpMethods) == 0 {
// no specific HTTP methods
httpMethodMatch = true
} else {
for _, httpMethod := range p.HttpMethods {
if httpMethod == c.MethodString() {
httpMethodMatch = true
break
}
}
}
// cancel early if we didn't get an HTTP Method match
if !httpMethodMatch {
return false, nil
}
// check path match
pathMatch := p.PathPattern.GetPathMatch(c.Path())
var allMatch bool
if matcherFuncDecisionMade {
allMatch = matcherFuncMatches
} else {
allMatch = pathMatch.Matches
}
if allMatch {
// save the match parameters for later
c.Data().Set(context.DataKeyPathParameters, pathMatch.Parameters)
}
return allMatch, nil
}
// WithPermanentRedirect responds with a redirection to the specific path or URL with the
// http.StatusMovedPermanently status.
func (r *GowebHTTPResponder) WithPermanentRedirect(ctx context.Context, pathOrURLSegments ...interface{}) error {
ctx.HttpResponseWriter().Header().Set("Location", paths.PathFromSegments(pathOrURLSegments...))
return r.WithStatus(ctx, http.StatusMovedPermanently)
}
// WithStatus writes the specified HTTP Status Code to the Context's ResponseWriter.
func (r *GowebHTTPResponder) WithStatus(ctx context.Context, httpStatus int) error {
ctx.HttpResponseWriter().WriteHeader(httpStatus)
return nil
}