接口原型
接口名称: user_recommend
调用参数:
UserRequest:
user_id # 用户id
channel_id # 频道id
article_num # 推荐的文章数量
time_stamp # 推荐的时间戳
返回数据:
ArticleResponse:
expousre # 曝光埋点数据
time_stamp # 推荐的时间戳
recommends: # 推荐结果
article_id # 文章id
track: # 关于文章的埋点数据
click # 用户点击行为的埋点参数
collect # 用户收藏的埋点参数
share # 用户分享的埋点参数
read # 用户进入文章详情的埋点参数
使用Protobuf 定义的接口如下
使用protobuf定义的接口文件通常以proto作为文件后缀名
在toutiao-backend/common/rpc目录下新建reco.proto文件
syntax = "proto3";
message UserRequest {
string user_id=1;
int32 channel_id=2;
int32 article_num=3;
int64 time_stamp=4;
}
message Track {
string click=1;
string collect=2;
string share=3;
string read=4;
}
message Article {
int64 article_id=1;
Track track=2;
}
message ArticleResponse {
string exposure=1;
int64 time_stamp=2;
repeated Article recommends=3;
}
service UserRecommend {
rpc user_recommend(UserRequest) returns(ArticleResponse) {}
}
python -m grpc_tools.protoc -I. --python_out=. --grpc_python_out=. reco.proto
在toutiao-backend/common/rpc目录下执行上述命令,会自动生成如下两个rpc调用辅助代码模块:
推荐系统接口编写
在toutiao-backend/toutiao/resources/news/article.py中编写
from rpc import reco_pb2, reco_pb2_grpc
class ArticleListResource(Resource):
"""
获取推荐文章列表数据
"""
def _feed_articles(self, channel_id, timestamp, feed_count):
"""
获取推荐文章
:param channel_id: 频道id
:param feed_count: 推荐数量
:param timestamp: 时间戳
:return: [{article_id, trace_params}, ...], timestamp
"""
user_request = reco_pb2.UserRequest()
user_request.user_id = g.user_id or 'annoy'
user_request.channel_id = channel_id
user_request.article_num = feed_count
user_request.time_stamp = round(time.time() * 1000)
stub = reco_pb2_grpc.UserRecommendStub(current_app.rpc_reco)
ret = stub.user_recommend(user_request)
return ret.recommends, ret.time_stamp
def get(self):
"""
获取文章列表
"""
qs_parser = RequestParser()
qs_parser.add_argument('channel_id', type=parser.channel_id, required=True, location='args')
qs_parser.add_argument('timestamp', type=inputs.positive, required=True, location='args')
args = qs_parser.parse_args()
channel_id = args.channel_id
timestamp = args.timestamp
per_page = constants.DEFAULT_ARTICLE_PER_PAGE_MIN
try:
feed_time = time.strftime('%Y-%m-%dT%H:%M:%S', time.localtime(time.time()))
except Exception:
return {'message': 'timestamp param error'}, 400
results = []
# 获取推荐文章列表
feeds, pre_timestamp = self._feed_articles(channel_id, timestamp, per_page)
# 查询文章
for feed in feeds:
article = cache_article.ArticleInfoCache(feed.article_id).get()
if article:
article['pubdate'] = feed_time
article['trace'] = {
'click': feed.track.click,
'collect': feed.track.collect,
'share': feed.track.share,
'read': feed.track.read
}
results.append(article)
return {'pre_timestamp': pre_timestamp, 'results': results}