mirror of
https://github.com/LibreTranslate/LibreTranslate.git
synced 2024-11-21 15:31:00 +00:00
Waitress support
This commit is contained in:
Piero Toffanin
parent
7853ec0f0a
commit
094b650be5
4 changed files with 247 additions and 196 deletions
221
app/app.py
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221
app/app.py
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@ -0,0 +1,221 @@
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from app.init import boot
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from flask import Flask, render_template, jsonify, request, abort, send_from_directory
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from app.language import languages
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from flask_swagger import swagger
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from flask_swagger_ui import get_swaggerui_blueprint
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from flask_limiter.util import get_remote_address
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def create_app(char_limit=-1, req_limit=-1, google_analytics=None, debug=False):
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boot()
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app = Flask(__name__)
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if debug:
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app.config['TEMPLATES_AUTO_RELOAD'] = True
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if req_limit > 0:
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from flask_limiter import Limiter
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limiter = Limiter(
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app,
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key_func=get_remote_address,
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default_limits=["%s per minute" % req_limit]
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)
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@app.errorhandler(400)
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def invalid_api(e):
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return jsonify({"error": str(e.description)}), 400
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@app.errorhandler(500)
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def server_error(e):
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return jsonify({"error": str(e.description)}), 500
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@app.errorhandler(429)
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def slow_down_error(e):
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return jsonify({"error": "Slowdown: " + str(e.description)}), 429
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@app.route("/")
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def index():
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return render_template('index.html', gaId=google_analytics)
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@app.route("/languages")
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def langs():
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"""
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Retrieve list of supported languages
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---
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tags:
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- translate
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responses:
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200:
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description: List of languages
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content:
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application/json:
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schema:
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type: array
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items:
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type: object
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properties:
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code:
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type: string
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description: Language code
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name:
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type: string
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description: Human-readable language name (in English)
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charLimit:
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type: string
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description: Character input limit for this language (-1 indicates no limit)
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429:
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description: Slow down
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content:
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application/json:
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schema:
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type: object
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properties:
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error:
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type: string
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description: Reason for slow down
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"""
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return jsonify([{'code': l.code, 'name': l.name, 'charLimit': char_limit } for l in languages])
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# Add cors
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@app.after_request
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def after_request(response):
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response.headers.add('Access-Control-Allow-Origin','*')
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response.headers.add('Access-Control-Allow-Headers', "Authorization, Content-Type")
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response.headers.add('Access-Control-Expose-Headers', "Authorization")
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response.headers.add('Access-Control-Allow-Methods', "GET, POST")
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response.headers.add('Access-Control-Allow-Credentials', "true")
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response.headers.add('Access-Control-Max-Age', 60 * 60 * 24 * 20)
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return response
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@app.route("/translate", methods=['POST'])
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def translate():
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"""
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Translate text from a language to another
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---
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tags:
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- translate
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parameters:
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- in: formData
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name: q
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schema:
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type: string
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example: Hello world!
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required: true
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description: Text to translate
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- in: formData
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name: source
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schema:
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type: string
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example: en
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required: true
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description: Source language code
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- in: formData
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name: target
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schema:
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type: string
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example: es
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required: true
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description: Target language code
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responses:
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200:
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description: Translated text
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content:
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application/json:
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schema:
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type: object
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properties:
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translatedText:
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type: string
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description: Translated text
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400:
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description: Invalid request
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content:
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application/json:
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schema:
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type: object
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properties:
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error:
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type: string
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description: Error message
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500:
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description: Translation error
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content:
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application/json:
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schema:
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type: object
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properties:
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error:
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type: string
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description: Error message
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429:
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description: Slow down
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content:
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application/json:
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schema:
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type: object
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properties:
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error:
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type: string
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description: Reason for slow down
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"""
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if request.is_json:
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json = request.get_json()
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q = json.get('q')
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source_lang = json.get('source')
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target_lang = json.get('target')
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else:
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q = request.values.get("q")
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source_lang = request.values.get("source")
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target_lang = request.values.get("target")
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if not q:
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abort(400, description="Invalid request: missing q parameter")
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if not source_lang:
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abort(400, description="Invalid request: missing source parameter")
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if not target_lang:
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abort(400, description="Invalid request: missing target parameter")
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if char_limit != -1:
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q = q[:char_limit]
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src_lang = next(iter([l for l in languages if l.code == source_lang]), None)
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tgt_lang = next(iter([l for l in languages if l.code == target_lang]), None)
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if src_lang is None:
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abort(400, description="%s is not supported" % source_lang)
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if tgt_lang is None:
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abort(400, description="%s is not supported" % target_lang)
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translator = src_lang.get_translation(tgt_lang)
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try:
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return jsonify({"translatedText": translator.translate(q) })
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except Exception as e:
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abort(500, description="Cannot translate text: %s" % str(e))
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swag = swagger(app)
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swag['info']['version'] = "1.0"
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swag['info']['title'] = "LibreTranslate"
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@app.route("/spec")
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def spec():
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return jsonify(swag)
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SWAGGER_URL = '/docs' # URL for exposing Swagger UI (without trailing '/')
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API_URL = 'http://petstore.swagger.io/v2/swagger.json' # Our API url (can of course be a local resource)
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# Call factory function to create our blueprint
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swaggerui_blueprint = get_swaggerui_blueprint(
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SWAGGER_URL,
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"",
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config={ # Swagger UI config overrides
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'app_name': "LibreTranslate",
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"spec": swag
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}
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)
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app.register_blueprint(swaggerui_blueprint)
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return app
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@ -371,17 +371,19 @@ document.addEventListener('DOMContentLoaded', function(){
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request.open('POST', BaseUrl + '/translate', true);
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request.onload = function() {
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if (this.status >= 200 && this.status < 400) {
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try{
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var res = JSON.parse(this.response);
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// Success!
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var res = JSON.parse(this.response);
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if (res.translatedText !== undefined){
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self.translatedText = res.translatedText;
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self.loadingTranslation = false;
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self.output = JSON.stringify(res, null, 4);
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}else{
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throw new Error(res.error || "Unknown error");
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}
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self.output = JSON.stringify(res, null, 4);
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} else {
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self.error = "Cannot call /translate";
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self.loadingTranslation = false;
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}catch(e){
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self.error = e.message;
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self.loadingTranslation = false;
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}
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};
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@ -399,8 +401,5 @@ document.addEventListener('DOMContentLoaded', function(){
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});
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</script>
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{% if gaId %}
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{% endif %}
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</body>
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</html>
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204
main.py
204
main.py
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@ -1,10 +1,5 @@
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from app.init import boot
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import argparse
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from flask import Flask, render_template, jsonify, request, abort, send_from_directory
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from app.language import languages
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from flask_swagger import swagger
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from flask_swagger_ui import get_swaggerui_blueprint
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from flask_limiter import Limiter
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from app.app import create_app
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parser = argparse.ArgumentParser(description='LibreTranslate - Free and Open Source Translation API')
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parser.add_argument('--host', type=str,
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@ -13,190 +8,25 @@ parser.add_argument('--port', type=int,
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help='Port (%(default)s)', default=5000)
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parser.add_argument('--char-limit', default=-1, metavar="<number of characters>",
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help='Set character limit (%(default)s)')
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parser.add_argument('--req-limit', default=-1, metavar="<number>",
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help='Set maximum number of requests per hour per client (%(default)s)')
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parser.add_argument('--google-analytics', default=None, metavar="<GA ID>",
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parser.add_argument('--req-limit', default=-1, type=int, metavar="<number>",
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help='Set maximum number of requests per minute per client (%(default)s)')
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parser.add_argument('--google-analytics', type=str, default=None, metavar="<GA ID>",
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help='Enable Google Analytics on the API client page by providing an ID (%(default)s)')
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parser.add_argument('--debug', default=False, action="store_true",
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help="Enable debug environment")
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parser.add_argument('--ssl', default=None, action="store_true",
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help="Whether to enable SSL")
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args = parser.parse_args()
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boot()
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app = Flask(__name__)
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app.config['TEMPLATES_AUTO_RELOAD'] = True
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@app.errorhandler(400)
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def invalid_api(e):
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return jsonify({"error": str(e.description)}), 400
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@app.errorhandler(500)
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def server_error(e):
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return jsonify({"error": str(e.description)}), 500
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@app.route("/")
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def index():
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return render_template('index.html', gaId=args.google_analytics)
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@app.route("/languages")
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def langs():
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"""
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Retrieve list of supported languages
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---
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tags:
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- translate
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responses:
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200:
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description: List of languages
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content:
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application/json:
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schema:
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type: array
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items:
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type: object
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properties:
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code:
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type: string
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description: Language code
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name:
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type: string
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description: Human-readable language name (in English)
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charLimit:
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type: string
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description: Character input limit for this language (-1 indicates no limit)
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"""
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return jsonify([{'code': l.code, 'name': l.name, 'charLimit': args.char_limit } for l in languages])
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# Add cors
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@app.after_request
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def after_request(response):
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response.headers.add('Access-Control-Allow-Origin','*')
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response.headers.add('Access-Control-Allow-Headers', "Authorization, Content-Type")
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response.headers.add('Access-Control-Expose-Headers', "Authorization")
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response.headers.add('Access-Control-Allow-Methods', "GET, POST")
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response.headers.add('Access-Control-Allow-Credentials', "true")
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response.headers.add('Access-Control-Max-Age', 60 * 60 * 24 * 20)
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return response
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@app.route("/translate", methods=['POST'])
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def translate():
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"""
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Translate text from a language to another
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---
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tags:
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- translate
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parameters:
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- in: formData
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name: q
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schema:
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type: string
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example: Hello world!
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required: true
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description: Text to translate
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- in: formData
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name: source
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schema:
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type: string
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example: en
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required: true
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description: Source language code
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- in: formData
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name: target
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schema:
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type: string
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example: es
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required: true
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description: Target language code
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responses:
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200:
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description: Translated text
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content:
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application/json:
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schema:
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type: object
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properties:
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translatedText:
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type: string
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description: Translated text
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400:
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description: Invalid request
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content:
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application/json:
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schema:
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type: object
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properties:
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error:
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type: string
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description: Error message
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500:
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description: Translation error
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content:
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application/json:
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schema:
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type: object
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properties:
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error:
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type: string
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description: Error message
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"""
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if request.is_json:
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json = request.get_json()
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q = json.get('q')
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source_lang = json.get('source')
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target_lang = json.get('target')
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else:
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q = request.values.get("q")
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source_lang = request.values.get("source")
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target_lang = request.values.get("target")
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if not q:
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abort(400, description="Invalid request: missing q parameter")
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if not source_lang:
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abort(400, description="Invalid request: missing source parameter")
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if not target_lang:
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abort(400, description="Invalid request: missing target parameter")
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if args.char_limit != -1:
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q = q[:args.char_limit]
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src_lang = next(iter([l for l in languages if l.code == source_lang]), None)
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tgt_lang = next(iter([l for l in languages if l.code == target_lang]), None)
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if src_lang is None:
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abort(400, description="%s is not supported" % source_lang)
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if tgt_lang is None:
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abort(400, description="%s is not supported" % target_lang)
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translator = src_lang.get_translation(tgt_lang)
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try:
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return jsonify({"translatedText": translator.translate(q) })
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except Exception as e:
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abort(500, description="Cannot translate text: %s" % str(e))
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swag = swagger(app)
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swag['info']['version'] = "1.0"
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swag['info']['title'] = "LibreTranslate"
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@app.route("/spec")
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def spec():
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return jsonify(swag)
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SWAGGER_URL = '/docs' # URL for exposing Swagger UI (without trailing '/')
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API_URL = 'http://petstore.swagger.io/v2/swagger.json' # Our API url (can of course be a local resource)
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# Call factory function to create our blueprint
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swaggerui_blueprint = get_swaggerui_blueprint(
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SWAGGER_URL,
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"",
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config={ # Swagger UI config overrides
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'app_name': "LibreTranslate",
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"spec": swag
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}
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)
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app.register_blueprint(swaggerui_blueprint)
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if __name__ == "__main__":
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app.run(host=args.host)
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app = create_app(char_limit=args.char_limit,
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req_limit=args.req_limit,
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google_analytics=args.google_analytics,
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debug=args.debug)
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if args.debug:
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app.run(host=args.host, port=args.port)
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else:
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from waitress import serve
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serve(app, host=args.host, port=args.port, url_scheme='https' if args.ssl else 'http')
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@ -3,3 +3,4 @@ Flask==1.1.2
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flask-swagger==0.2.14
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flask-swagger-ui==3.36.0
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Flask-Limiter==1.4
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waitress==1.4.4
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