97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
package routes
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import (
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"bytes"
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"encoding/json"
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"encoding/xml"
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"io/ioutil"
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"net/http"
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"strconv"
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)
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// Helper Functions to Read from the http.Request Body -------------------------
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// ReadJson parses the JSON-encoded data in the http.Request object and
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// stores the result in the value pointed to by v.
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func ReadJson(r *http.Request, v interface{}) error {
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body, err := ioutil.ReadAll(r.Body)
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r.Body.Close()
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if err != nil {
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return err
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}
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return json.Unmarshal(body, v)
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}
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// ReadXml parses the XML-encoded data in the http.Request object and
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// stores the result in the value pointed to by v.
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func ReadXml(r *http.Request, v interface{}) error {
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body, err := ioutil.ReadAll(r.Body)
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r.Body.Close()
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if err != nil {
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return err
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}
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return xml.Unmarshal(body, v)
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}
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// Helper Functions to Write to the http.ReponseWriter -------------------------
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// ServeJson writes the JSON representation of resource v to the
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// http.ResponseWriter.
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func ServeJson(w http.ResponseWriter, v interface{}) {
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content, err := json.MarshalIndent(v, "", " ")
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Length", strconv.Itoa(len(content)))
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w.Header().Set("Content-Type", "application/json")
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w.Write(content)
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}
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// ServeXml writes the XML representation of resource v to the
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// http.ResponseWriter.
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func ServeXml(w http.ResponseWriter, v interface{}) {
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content, err := xml.Marshal(v)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Length", strconv.Itoa(len(content)))
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w.Header().Set("Content-Type", "text/xml; charset=utf-8")
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w.Write(content)
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}
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// ServeTemplate applies the named template to the specified data map and
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// writes the output to the http.ResponseWriter.
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func ServeTemplate(w http.ResponseWriter, name string, data map[string]interface{}) {
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// cast the writer to the resposneWriter, get the router
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r := w.(*responseWriter).Router
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r.RLock()
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defer r.RUnlock()
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if data == nil {
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data = map[string]interface{}{}
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}
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// append global params to the template
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for k, v := range r.params {
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data[k] = v
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}
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var buf bytes.Buffer
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if err := r.views.ExecuteTemplate(&buf, name, data); err != nil {
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panic(err)
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return
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}
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// set the content length, type, etc
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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w.Write(buf.Bytes())
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}
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// Error will terminate the http Request with the specified error code.
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func Error(w http.ResponseWriter, code int) {
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http.Error(w, http.StatusText(code), code)
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}
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