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Diffstat (limited to 'vendor/github.com/llgcode/draw2d/samples/appengine/server.go')
-rw-r--r--vendor/github.com/llgcode/draw2d/samples/appengine/server.go73
1 files changed, 73 insertions, 0 deletions
diff --git a/vendor/github.com/llgcode/draw2d/samples/appengine/server.go b/vendor/github.com/llgcode/draw2d/samples/appengine/server.go
new file mode 100644
index 0000000..ff44895
--- /dev/null
+++ b/vendor/github.com/llgcode/draw2d/samples/appengine/server.go
@@ -0,0 +1,73 @@
+// +build appengine
+
+// Package gae demonstrates draw2d on a Google appengine server.
+package gae
+
+import (
+ "fmt"
+ "image"
+ "image/png"
+ "net/http"
+
+ "github.com/llgcode/draw2d/draw2dimg"
+ "github.com/llgcode/draw2d/draw2dpdf"
+ "github.com/llgcode/draw2d/samples/android"
+
+ "appengine"
+)
+
+type appError struct {
+ Error error
+ Message string
+ Code int
+}
+
+type appHandler func(http.ResponseWriter, *http.Request) *appError
+
+func (fn appHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+ if e := fn(w, r); e != nil { // e is *appError, not os.Error.
+ c := appengine.NewContext(r)
+ c.Errorf("%v", e.Error)
+ http.Error(w, e.Message, e.Code)
+ }
+}
+
+func init() {
+ http.Handle("/pdf", appHandler(pdf))
+ http.Handle("/png", appHandler(imgPng))
+}
+
+func pdf(w http.ResponseWriter, r *http.Request) *appError {
+ w.Header().Set("Content-type", "application/pdf")
+
+ // Initialize the graphic context on an pdf document
+ dest := draw2dpdf.NewPdf("L", "mm", "A4")
+ gc := draw2dpdf.NewGraphicContext(dest)
+
+ // Draw sample
+ android.Draw(gc, 65, 0)
+
+ err := dest.Output(w)
+ if err != nil {
+ return &appError{err, fmt.Sprintf("Can't write: %s", err), 500}
+ }
+ return nil
+}
+
+func imgPng(w http.ResponseWriter, r *http.Request) *appError {
+ w.Header().Set("Content-type", "image/png")
+
+ // Initialize the graphic context on an RGBA image
+ dest := image.NewRGBA(image.Rect(0, 0, 297, 210.0))
+ gc := draw2dimg.NewGraphicContext(dest)
+
+ // Draw sample
+ android.Draw(gc, 65, 0)
+
+ err := png.Encode(w, dest)
+ if err != nil {
+ return &appError{err, fmt.Sprintf("Can't encode: %s", err), 500}
+ }
+
+ return nil
+}