Template used to setup wkhtmltopdf as a Kubernetes service. The service defaults to internal use only.
Uses https://hub.docker.com/r/openlabs/docker-wkhtmltopdf-aas/ as the docker image
NOTE: Your HTML document must use absolute links (http://) for all images, stylesheets and scripts
Add your GCE project ID to the rc.yaml, service.yaml and Makefile where you see "replace with project id"
make
Pulls down the docker image and creates the Kubernetes service and replication controller.
package pdfgen
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
)
// ServiceUrl is the url that hosts the wkhtmltopdf service
var ServiceUrl = "http://pdf-service/"
type body struct {
Contents string `json:"contents"`
}
// HtmlToPdf converts HTML to a PDF
func HtmlToPdf(b []byte) ([]byte, error) {
bd := body{
Contents: base64.StdEncoding.EncodeToString(b),
}
b, err := json.Marshal(bd)
if err != nil {
return nil, err
}
req, err := http.NewRequest("POST", ServiceUrl, bytes.NewReader(b))
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", "application/json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
b, err = ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode != 200 {
fmt.Println("body:", string(b))
return nil, fmt.Errorf("Non 200 response")
}
return b, nil
}
// Serve serves the pdf to the browser
func Serve(w http.ResponseWriter, filename string, pdf []byte) {
w.Header().Set("Content-Type", "applicaiton/pdf")
w.Header().Set("Content-Disposition", "attachment; filename="+filename)
w.Write(pdf)
}