/*
* Handle HTTPS requests.
* @param resp http.ResponseWriter - response buffer
* @param req *http.Request - request data
*/
func handler(resp http.ResponseWriter, req *http.Request) {
// get requested resource reference
ref := req.URL.String()
mth := req.Method
logger.Println(logger.DBG_ALL, "[https] "+mth+" "+ref)
//-----------------------------------------------------------------
// check for POST request (document upload)
//-----------------------------------------------------------------
if mth == "POST" {
// get upload data
rdr, _, err := req.FormFile("file")
if err != nil {
logger.Println(logger.INFO, "[https] Error accessing uploaded file: "+err.Error())
// show error page
ref = "/upload_err.html"
mth = "GET"
} else {
content := make([]byte, 0)
if err = sid.ProcessStream(rdr, 4096, func(data []byte) bool {
content = append(content, data...)
return true
}); err != nil {
logger.Println(logger.INFO, "[https] Error accessing uploaded file: "+err.Error())
// show error page
ref = "/upload_err.html"
mth = "GET"
} else {
// post-process uploaded document
sid.PostprocessUploadData(content)
// set resource ref to response page
ref = "/upload_resp.html"
mth = "GET"
}
}
}
//-----------------------------------------------------------------
// handle GET requests
//-----------------------------------------------------------------
if mth == "GET" {
// set default page
if ref == "/" {
ref = "/index.html"
}
// handle resource file
switch {
case strings.HasSuffix(ref, ".html"):
resp.Header().Set("Content-Type", "text/html")
}
if err := sid.ProcessFile("./www"+ref, 4096, func(data []byte) bool {
// append data to response buffer
resp.Write(data)
return true
}); err != nil {
logger.Println(logger.ERROR, "[https] Resource failure: "+err.Error())
}
}
}
/*
* Handle (HTML) resource request with special cases like "upload".
* @param c *sid.Cover - instance reference
* @param s *sid.State - reference to cover state
* @return body string - HTML page body
* @return id string - identifier for cover content (or "")
*/
func HandleRequest(c *sid.Cover, s *sid.State) (body string, id string) {
//=================================================================
// Handle upload request on root page
//=================================================================
if s.ReqResource == "/" {
// create boundary identifier and load next image
delim := sid.CreateId(28)
img := GetNextImage()
// create uploadable content
content := make([]byte, 0)
if err := sid.ProcessFile(img.path, 4096, func(data []byte) bool {
content = append(content, data...)
return true
}); err != nil {
logger.Println(logger.ERROR, "[cover] Failed to open upload file: "+img.path)
return "", ""
}
// build POST content suitable for upload to cover site
// and save it in the handler structure
lb := "\r\n"
lb2 := lb + lb
lb3 := lb2 + lb
sep := "-----------------------------" + delim
post :=
sep + lb + "Content-Disposition: form-data; name=\"imgUrl\"" + lb3 +
sep + lb + "Content-Disposition: form-data; name=\"fileName[]\"" + lb3 +
sep + lb + "Content-Disposition: form-data; name=\"file[]\"; filename=\"" +
img.name + "\"" + lb + "Content-Type: " + img.mime + lb2 + string(content) + lb +
sep + lb + "Content-Disposition: form-data; name=\"alt[]\"\n\n" + img.comment + lb +
sep + lb + "Content-Disposition: form-data; name=\"new_width[]\"" + lb3 +
sep + lb + "Content-Disposition: form-data; name=\"new_height[]\"" + lb3 +
sep + lb + "Content-Disposition: form-data; name=\"submit\"" + lb2 + "Upload" + lb +
sep + "--" + lb2
c.Posts[delim] = []byte(post)
// assemble upload form
action := "/" + delim + "/upload"
total := len(c.Posts[delim]) + 32
return "<h1>Upload your document:</h1>\n" +
"<script type=\"text/javascript\">\n" +
"function a(){" +
"b=document.u.file.files.item(0).getAsDataURL();" +
"e=document.u.file.value.length;" +
"c=Math.ceil(3*(b.substring(b.indexOf(\",\")+1).length+3)/4);" +
"f=" + strconv.Itoa(total) + "-c-e-307;" +
"if(f<0){alert(\"File size exceeds limit - can't upload!!\");}else{" +
"d=\"\";for(i=0;i<f;i++){d+=b.charAt(i%c)}" +
"document.u.rnd.value=d;" +
"document.u.submit();" +
"}}\n" +
"document.write(\"" +
"<form enctype=\\\"multipart/form-data\\\" action=\\\"" + action + "\\\" method=\\\"post\\\" name=\\\"u\\\">" +
"<p><input type=\\\"file\\\" name=\\\"file\\\"/></p>" +
"<p><input type=\\\"button\\\" value=\\\"Upload\\\" onclick=\\\"a()\\\"/></p>" +
"<input type=\\\"hidden\\\" name=\\\"rnd\\\" value=\\\"\\\"/>" +
"</form>\");\n" +
"</script>" +
"<noscript><hr/><p><font color=\"red\"><b>" +
"Uploading files requires JavaScript enabled! Please change the settings " +
"of your browser and try again...</b></font></p><hr/>" +
"</noscript>\n" +
"<hr/>\n", delim
}
//=================================================================
// Successful upload
//=================================================================
if s.ReqResource == "/thumbnail" {
logger.Println(logger.INFO, "[cover] Successful upload detected!")
return "<h1>Upload was successful!</h1>", ""
}
//=================================================================
// Error during upload
//=================================================================
logger.Println(logger.INFO, "[cover] Failed upload detected!")
return "<h1>Upload was NOT successful -- please retry later!</h1>", ""
}