Kurt Jungs Auslieferungszustand

contrib/httpimg/httpimg.go

@@ -0,0 +1,43 @@
+package httpimg
+
+import (
+	"io"
+	"net/http"
+
+	"github.com/jung-kurt/gofpdf"
+)
+
+// httpimgPdf is a partial interface that only implements the functions we need
+// from the PDF generator to put the HTTP images on the PDF.
+type httpimgPdf interface {
+	GetImageInfo(imageStr string) *gofpdf.ImageInfoType
+	ImageTypeFromMime(mimeStr string) string
+	RegisterImageReader(imgName, tp string, r io.Reader) *gofpdf.ImageInfoType
+	SetError(err error)
+}
+
+// Register registers a HTTP image. Downloading the image from the provided URL
+// and adding it to the PDF but not adding it to the page. Use Image() with the
+// same URL to add the image to the page.
+func Register(f httpimgPdf, urlStr, tp string) (info *gofpdf.ImageInfoType) {
+	info = f.GetImageInfo(urlStr)
+
+	if info != nil {
+		return
+	}
+
+	resp, err := http.Get(urlStr)
+
+	if err != nil {
+		f.SetError(err)
+		return
+	}
+
+	defer resp.Body.Close()
+
+	if tp == "" {
+		tp = f.ImageTypeFromMime(resp.Header["Content-Type"][0])
+	}
+
+	return f.RegisterImageReader(urlStr, tp, resp.Body)
+}

contrib/httpimg/httpimg_test.go

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+package httpimg_test
+
+import (
+	"github.com/jung-kurt/gofpdf"
+	"github.com/jung-kurt/gofpdf/contrib/httpimg"
+	"github.com/jung-kurt/gofpdf/internal/example"
+)
+
+func ExampleRegister() {
+	pdf := gofpdf.New("L", "mm", "A4", "")
+	pdf.SetFont("Helvetica", "", 12)
+	pdf.SetFillColor(200, 200, 220)
+	pdf.AddPage()
+
+	url := "https://github.com/jung-kurt/gofpdf/raw/master/image/logo_gofpdf.jpg?raw=true"
+	httpimg.Register(pdf, url, "")
+	pdf.Image(url, 15, 15, 267, 0, false, "", 0, "")
+	fileStr := example.Filename("contrib_httpimg_Register")
+	err := pdf.OutputFileAndClose(fileStr)
+	example.Summary(err, fileStr)
+	// Output:
+	// Successfully generated ../../pdf/contrib_httpimg_Register.pdf
+}