"Upload file input"

tetawebapp/config.local.py

@@ -1,2 +1,3 @@
 SQLALCHEMY_TRACK_MODIFICATIONS = True
 SQLALCHEMY_DATABASE_URI = "postgresql://tetawebapp:tetawebapp@localhost/tetawebapp"
+UPLOADED_FILES_DEST = "./upload"

tetawebapp/static/scripts/tetawebapp.js

@@ -4,6 +4,9 @@ var light_red = "#FCD5DC";
 var light_green = "#D5FCD8";
 var base_bg = "#FFFFFF";
 var base_border = "#888888";
+var coloured_bg = "#FF5D00";
+var clear_bg = "#E5E5E5";
+var text_color = "#555555";
 
 /* **************************************************************************************
  * GLOBAL
@@ -26,6 +29,17 @@ function getcookie(cname) {
 }
 
 // Eye candies
+function valid_input(obj) {
+  // Valid input makes obj background to glow green for 2 seconds
+  // If obj borders were red, they get they normal color back
+  obj.style.backgroundColor = light_green;
+  obj.style.borderColor = base_border;
+  setTimeout( function() {
+    obj.style.backgroundColor = base_bg;
+    }
+  , 2000);
+}
+
 function invalid_input(obj) {
   // Invalid input makes obj borders and background to glow red for 2 seconds
   // Border color will stay red until a valid input is sent
@@ -37,17 +51,48 @@ function invalid_input(obj) {
   , 2000);
 }
 
-function valid_input(obj) {
+function valid_upload(obj) {
   // Valid input makes obj background to glow green for 2 seconds
   // If obj borders were red, they get they normal color back
-  obj.style.backgroundColor = light_green;
-  obj.style.borderColor = base_border;
+  obj.style.backgroundColor = green;
+  obj.style.borderColor = text_color;
+  obj.style.borderStyle = 'solid';
   setTimeout( function() {
-    obj.style.backgroundColor = base_bg;
+    obj.style.backgroundColor = clear_bg;
+    obj.style.borderStyle = 'none';
     }
   , 2000);
 }
 
+function invalid_upload(obj) {
+  // Invalid input makes obj borders and background to glow red for 2 seconds
+  // Border color will stay red until a valid input is sent
+  obj.style.backgroundColor = red;
+  obj.style.borderColor = text_color;
+  obj.style.borderStyle = 'solid';
+  setTimeout( function() {
+    obj.style.borderStyle = 'solid';
+    obj.style.backgroundColor = clear_bg;
+    obj.style.borderColor = red;
+    }
+  , 2000);
+}
+
+function lit(obj) {
+  // Lit bacground and border on obj (use by input type=file)
+  obj.style.backgroundColor = coloured_bg;
+  obj.style.borderColor = text_color;
+  obj.style.borderStyle = 'solid';
+}
+
+function unlit(obj) {
+  // Unlit bacground and border on obj (use by input type=file)
+  obj.style.backgroundColor = clear_bg;
+  obj.style.borderColor = clear_bg;
+  obj.style.borderStyle = 'none';
+}
+
+
 function verify_login() {
   // Verify login inputs
   login = document.getElementById('login');
@@ -156,6 +201,44 @@ function get_value_from_ajax(obj, url, err_code) {
     }
   };
   xhttp.open('POST', url, true);
+  alert(xhttp.readyState);
   xhttp.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
   xhttp.send();
 }
+
+function upload_file_from_ajax(obj, url, err_code) {
+  // Upload files get from <obj> to the specified <url>
+  // if <errcode> is returned input is invalidated
+  var files = obj.files;
+  var icon_id = obj.id.substring(obj.id.lastIndexOf("_") + 1);
+  var icon_obj = document.getElementById("upload_icon_" + icon_id)
+  var xhttp = new XMLHttpRequest();
+  xhttp.onerror = function(){
+    invalid_upload(icon_obj);
+  };
+
+  xhttp.onload = function(){
+    if (xhttp.status != 200) {
+      invalid_upload(icon_obj);
+      } 
+  };
+
+  xhttp.onreadystatechange = function() {
+    if (xhttp.readyState == 4 && xhttp.status == 200) {
+      var response = xhttp.responseText;
+      if (response == err_code) {
+        invalid_upload(icon_obj);
+        return;
+      }
+      valid_upload(icon_obj);
+      return;
+    }
+  };
+  
+  xhttp.open('POST', url, true);
+  var formData = new FormData();
+  for (var i=0; i < files.length; i++){
+    formData.append("files", files[i], files[i].name);
+  }
+  xhttp.send(formData);
+}

tetawebapp/static/styles/colors.css

@@ -25,4 +25,5 @@
     --save_icon: url(/static/images/save.png);
     --search_icon: url(/static/images/search.png);
     --trash_icon: url(/static/images/trash.png);
+    --upload_icon: url(/static/images/upload.png);
 }

tetawebapp/static/styles/tetawebapp.css

@@ -254,12 +254,36 @@ input[type="submit"] {
 
 button:hover,
 input[type="button"]:hover,
-input[type="submit"]:hover {
+input[type="submit"]:hover,
+input[type="file"]:hover {
   background-color: var(--light-coloured-bg);
   color: var(--text-color);
   cursor: pointer;
 }
 
+div.file_upload {
+  display: inline-block;
+  position: relative;
+  width: 20px;
+  height: 20px;
+  margin: 0;
+  padding: 0;
+  border-radius: 2px;
+  border-style: solid;
+  border-width: 1px;
+  border-color: var(--clear-bg);
+}
+
+input[type="file"] {
+  position: absolute;
+  width: 18px;
+  height: 18px;
+  left: 0;
+  top: 1px;
+  opacity: 0;
+}
+
+
 input.add,
 input.edit,
 input.login,
@@ -267,7 +291,8 @@ input.logout,
 input.refresh,
 input.save,
 input.search,
-input.trash {
+input.trash,
+input.upload {
   width: 20px;
   height: 20px;
   margin: 0;
@@ -283,7 +308,8 @@ input.logout:hover,
 input.refresh:hover,
 input.save:hover,
 input.search:hover,
-input.trash:hover {
+input.trash:hover,
+input.upload:hover {
   border-color: var(--text-color);
   border-style: solid;
   border-width: 1px;
@@ -331,3 +357,8 @@ input.trash {
   background-repeat: no-repeat;
   background-position: center center;
 }
+input.upload {
+  background: var(--upload_icon);
+  background-repeat: no-repeat;
+  background-position: center center;
+}

tetawebapp/templates/ajax.html

@@ -25,4 +25,16 @@
           <input type='button' value="Try me" onclick='javascript:get_value_from_ajax(document.getElementById("value_receiver"), "/get_value_from_ajax", "TETA_ERR");'>
         </article>
       </section>
+      <article class='left'>
+        <h3>Upload files with AJAX</h3>
+        <p>Select files to upload</p>
+        <p>The response may randomly be an error response so you should try it more than once.</p>
+        <div class='file_upload'>
+          <!--
+            Input file is a tricky hack (see tetawebapp.css and tetawebapp.js)
+          -->
+          <input type='button' id='upload_icon_1' class='upload' title='Upload' value=' '/>
+          <input type='file' id='upload_input_1' multiple title='Upload' value='' onchange='javascript:upload_file_from_ajax(this, "/upload", "TETA_ERR");' onmouseover='javascript:lit(document.getElementById("upload_icon_1"));' onmouseout='javascript:unlit(document.getElementById("upload_icon_1"));'/>
+        </div>
+      </article>
       {% endblock %}

tetawebapp/templates/inputs.html

@@ -20,14 +20,21 @@
         <br/>
         <input type='button' value='And me !' />
         <br/>
-        <input type='button' class='add' title='add' value=' '/>
-        <input type='button' class='edit' title='edit' value=' '/>
-        <input type='button' class='login' title='login' value=' '/>
-        <input type='button' class='logout' title='logout' value=' '/>
-        <input type='button' class='refresh' title='refresh' value=' '/>
-        <input type='button' class='save' title='save' value=' '/>
-        <input type='button' class='search' title='search' value=' '/>
-        <input type='button' class='trash' title='trash' value=' '/>
+        <input type='button' class='add' title='Add' value=' '/>
+        <input type='button' class='edit' title='Edit' value=' '/>
+        <input type='button' class='login' title='Login' value=' '/>
+        <input type='button' class='logout' title='Logout' value=' '/>
+        <input type='button' class='refresh' title='Refresh' value=' '/>
+        <input type='button' class='save' title='Save' value=' '/>
+        <input type='button' class='search' title='Search' value=' '/>
+        <input type='button' class='trash' title='Trash' value=' '/>
+        <!--
+          Input file is a tricky hack (see tetawebapp.css and tetawebapp.js)
+        -->
+        <div class='file_upload'>
+          <input type='button' id='upload_icon_1' class='upload' title='Upload' value=' '/>
+          <input type='file' id='upload_input_1' name='files' multiple title='Upload' value='' onchange='javascript:upload_file_from_ajax(this, "/upload", "TETA_ERR");' onmouseover='javascript:lit(document.getElementById("upload_icon_1"));' onmouseout='javascript:unlit(document.getElementById("upload_icon_1"));'/>
+        </div>
         <br/>
         <pre>
 #!/bin/sh

tetawebapp/tetawebapp.py

@@ -224,7 +224,7 @@ def get_html_from_ajax():
   """ Return HTML code to an AJAX request
       It may generate a 404 http error for testing purpose """
   if int(random.random()*10) % 2:
-    # Randomlu generate 404 HTTP response
+    # Randomly generate 404 HTTP response
     return render_template('error.html'), 404
   return render_template('ajax_html.html')
 
@@ -236,7 +236,7 @@ def get_value_from_ajax():
   err_code = 'TETA_ERR'
   RND = int(random.random()*10)
   if RND % 2:
-    # Randomlu generate error
+    # Randomly generate error
     return err_code
   return str(RND)
 
@@ -250,6 +250,31 @@ def set_value_from_ajax(value):
     return 'True'
   return err_code
 
+@app.route("/upload", methods=['POST'])
+@check_session
+def upload():
+  """ Accept a value from an AJAX request
+      It may return an error code for testing purpose """
+  err_code = 'TETA_ERR'
+  RND = int(random.random()*10)
+  if RND % 2:
+    # Randomly generate error
+    print err_code
+    return err_code
+  uploaded_files = []
+  if len(request.files) > 0 and request.files['files']:
+    uploaded_files = request.files.getlist("files")
+  print "Uploaded files:"
+  for f in uploaded_files:
+    print '  [+] %s [%s]' % (f.filename, f.content_type)
+    # Befor saving you should:
+    # - Secure the filename
+    # - Check file size
+    # - Check content type
+    f.save(os.path.join(app.config['UPLOADED_FILES_DEST'], f.filename))
+    f.close()
+  return "OK"
+
 ########################################################################
 # Main
 ########################################################################