support baidu translator api

Author: yihuang

docs/settings.rst

@@ -7,6 +7,7 @@ Rosetta can be configured via the following parameters, to be defined in your pr
 * ``ROSETTA_ENABLE_TRANSLATION_SUGGESTIONS``: Enable AJAX translation suggestions. Defaults to ``False``.
 * ``YANDEX_TRANSLATE_KEY``: Translation suggestions from Yandex `Yandex.Translate API <http://api.yandex.com/translate/>`_. To use this service you must first `obtain an AppID key <http://api.yandex.com/key/form.xml?service=trnsl>`_, then specify the key here. Defaults to ``None``.
 * ``AZURE_CLIENT_SECRET``: Translation suggestions using the Microsoft Azure Translator API. To use this service, you must first `register for the service <https://docs.microsoft.com/en-us/azure/cognitive-services/Translator/translator-text-how-to-signup>`_, and set ``AZURE_CLIENT_SECRET`` to either of the keys listed for your subscription. Defaults to ``None``.
+* ``BAIDU_FANYI_APPID`` and ``BAIDU_FANYI_SECRETKEY``: Translation suggestions from `Baidu Translator API <https://fanyi-api.baidu.com/api/trans/product/prodinfo>`_. Defaults to ``None``.
 * ``ROSETTA_MESSAGES_SOURCE_LANGUAGE_CODE`` and ``ROSETTA_MESSAGES_SOURCE_LANGUAGE_NAME``: Change these if the source language in your PO files isn't English. Default to ``'en'`` and ``'English'`` respectively.
 * ``ROSETTA_WSGI_AUTO_RELOAD`` and ``ROSETTA_UWSGI_AUTO_RELOAD``: When running WSGI daemon mode, using ``mod_wsgi`` 2.0c5 or later, this setting controls whether the contents of the gettext catalog files should be automatically reloaded by the WSGI processes each time they are modified. For performance reasons, this setting should be disabled in production environments. Default to ``False``.
 * ``ROSETTA_EXCLUDED_APPLICATIONS``: Exclude applications defined in this list from being translated. Defaults to ``()``.

rosetta/conf/settings.py

@@ -4,7 +4,7 @@
 MESSAGES_PER_PAGE = getattr(settings, 'ROSETTA_MESSAGES_PER_PAGE', 10)
 
 
-# Enable Google translation suggestions
+# Enable translation suggestions by different translation services.
 ENABLE_TRANSLATION_SUGGESTIONS = getattr(settings, 'ROSETTA_ENABLE_TRANSLATION_SUGGESTIONS', False)
 
 
@@ -15,6 +15,10 @@
 # https://docs.microsoft.com/en-us/azure/cognitive-services/Translator/translator-text-how-to-signup
 AZURE_CLIENT_SECRET = getattr(settings, 'AZURE_CLIENT_SECRET', None)
 
+# Can be obtained for free here: https://fanyi-api.baidu.com
+BAIDU_FANYI_APPID = getattr(settings, 'BAIDU_FANYI_APPID', None)
+BAIDU_FANYI_SECRETKEY = getattr(settings, 'BAIDU_FANYI_SECRETKEY', None)
+
 # Displays this language beside the original MSGID in the admin
 MAIN_LANGUAGE = getattr(settings, 'ROSETTA_MAIN_LANGUAGE', None)
 

rosetta/templates/rosetta/js/rosetta.js

@@ -21,7 +21,35 @@ google.setOnLoadCallback(function() {
         orig = unescape(orig).replace(/<br\s?\/?>/g,'\n').replace(/<code>/,'').replace(/<\/code>/g,'').replace(/&gt;/g,'>').replace(/&lt;/g,'<');
         a.attr('class','suggesting').html('...');
 
-        $.getJSON("{% url 'rosetta.translate_text' %}", {
+        $.getJSON("{% url 'rosetta.translate_text_azure' %}", {
+                from: sourceLang,
+                to: destLang,
+                text: orig
+            },
+            function(data) {
+                if (data.success){
+                    trans.val(unescape(data.translation).replace(/&#39;/g,'\'').replace(/&quot;/g,'"').replace(/%\s+(\([^\)]+\))\s*s/g,' %$1s '));
+                    a.hide();
+                } else {
+                    a.text(data.error);
+                }
+            }
+        );
+    });
+   {% elif rosetta_settings.BAIDU_FANYI_APPID %}
+    $('a.suggest').click(function(e){
+        e.preventDefault();
+        var a = $(this);
+        var str = a.html();
+        var orig = $('.original .message', a.parents('tr')).html();
+        var trans=$('textarea',a.parent());
+        var sourceLang = '{{ rosetta_settings.MESSAGES_SOURCE_LANGUAGE_CODE }}';
+        var destLang = '{{ rosetta_i18n_lang_code }}';
+
+        orig = unescape(orig).replace(/<br\s?\/?>/g,'\n').replace(/<code>/,'').replace(/<\/code>/g,'').replace(/&gt;/g,'>').replace(/&lt;/g,'<');
+        a.attr('class','suggesting').html('...');
+
+        $.getJSON("{% url 'rosetta.translate_text_baidu' %}", {
                 from: sourceLang,
                 to: destLang,
                 text: orig

rosetta/urls.py

@@ -38,8 +38,14 @@
         name='rosetta-download-file',
         ),
 
-    url(r'^translate/$',
-        views.translate_text,
-        name='rosetta.translate_text',
+    url(r'^translate/azure/$',
+        views.translate_text_azure,
+        name='rosetta.translate_text_azure',
         ),
+
+    url(r'^translate/baidu/$',
+        views.translate_text_baidu,
+        name='rosetta.translate_text_baidu',
+        ),
+
 ]

rosetta/views.py

@@ -2,6 +2,7 @@
 import os
 import os.path
 import re
+import random
 try:
     # Python 3
     from urllib.parse import urlencode
@@ -658,7 +659,7 @@ def get(self, request, *args, **kwargs):
 
 
 @user_passes_test(lambda user: can_translate(user), settings.LOGIN_URL)
-def translate_text(request):
+def translate_text_azure(request):
 
     def translate(text, from_language, to_language, subscription_key):
         """
@@ -749,5 +750,79 @@ def translate(text, from_language, to_language, subscription_key):
     return JsonResponse(data)
 
 
+BAIDU_LANGUAGE_MAP = {
+    'zh-hans': 'zh',
+    'zh-hant': 'cht',
+    'en': 'en',
+    'ja': 'jp',
+    'ko': 'kor',
+    'fr': 'fra',
+    'es': 'spa',
+    'ar': 'ara',
+    'bg': 'bul',
+    'et': 'est',
+    'da': 'dan',
+    'fi': 'fin',
+    'ro': 'rom',
+    'sl': 'slo',
+    'sv': 'swe',
+    'vi': 'vie',
+}
+
+
+def baidu_translate(appid, secretkey, q, fromlang, tolang):
+    baseurl = 'http://api.fanyi.baidu.com/api/trans/vip/translate'
+    salt = random.randint(32768, 65536)
+    sign = appid+q+str(salt)+secretkey
+    sign = hashlib.md5(sign.encode('utf-8')).hexdigest()
+    url = baseurl + '?' + urlencode({
+        'appid': appid,
+        'q': q,
+        'from': BAIDU_LANGUAGE_MAP.get(fromlang, fromlang),
+        'to': BAIDU_LANGUAGE_MAP.get(tolang, tolang),
+        'salt': str(salt),
+        'sign': sign
+    })
+    try:
+        print('url', url)
+        response = requests.get(url).text
+    except requests.exceptions.RequestException as err:
+        data = {
+            'success': False,
+            'error': "Error connecting to Baidu Translation Service: {0}".format(err)
+        }
+    else:
+        rsp = json.loads(response)
+        if 'error_code' in rsp:
+            data = {
+                'success': False,
+                'error': 'Baidu translation service error: {0} {1}'.format(
+                    rsp['error_code'], rsp['error_msg']
+                )
+            }
+        elif not rsp.get('trans_result'):
+            data = {
+                'success': False,
+                'error': 'Baidu translation service don\'t return translation result'
+            }
+        else:
+            data = {
+                'success': True,
+                'translation': rsp['trans_result'][0]['dst']
+            }
+
+    return data
+
+
+@user_passes_test(lambda user: can_translate(user), settings.LOGIN_URL)
+def translate_text_baidu(request):
+    appid = getattr(settings, 'BAIDU_FANYI_APPID', None)
+    secretkey = getattr(settings, 'BAIDU_FANYI_SECRETKEY', None)
+    if not appid or not secretkey:
+        return JsonResponse(data={'success': False, 'error': 'Baidu fanyi service is not configed'})
+    return JsonResponse(baidu_translate(
+        appid, secretkey, request.GET['text'], request.GET['from'], request.GET['to']))
+
+
 def urlencode_safe(query):
     return urlencode({k: force_bytes(v) for k, v in query.items()})