modis-crawler-utils 0.3.27

Scrapy utils for Modis crawlers projects.

crawler-utils

Scrapy utils for Modis crawlers projects.

MongoDB

Some utils connected with mongodb.

MongoDBPipeline - pipeline for saving items in mongodb.

Params:

• MONGODB_SERVER - address of mongodb database.
• MONGODB_PORT - port of mongodb database.
• MONGODB_DB - database where to save data.
• MONGODB_USERNAME - username for authentication in MONGODB_DB database.
• MONGODB_PWD - password for authentication.
• DEFAULT_MONGODB_COLLECTION - default collection where to save data (default value is test).
• MONGODB_COLLECTION_KEY - key of item which identifies items collection name (MONGO_COLLECTION) where to save item (default value is collection).
• MONGODB_UNIQUE_KEY - key of item which identifies item

Kafka

Some utils connected with kafka.

KafkaPipeline - pipeline for pushing items into kafka.

Pipeline outputs data into stream with name {RESOURCE_TAG}.{DATA_TYPE}. Where RESOURCE_TAG is tag of resource from which data is crawled and DATA_TYPE is type of data crawled: data, post, comment, like, user, friend, share, member, news, community.

Params:

• KAFKA_ADDRESS - address of kafka broker.
• KAFKA_KEY - key of item which is put into kafka record key.
• KAFKA_RESOURCE_TAG_KEY - key of item which identifies item RESOURCE_TAG (default value is platform)
• KAFKA_DEFAULT_RESOURCE_TAG - default RESOURCE_TAG for crawled items without KAFKA_RESOURCE_TAG_KEY (default value is crawler)
• KAFKA_DATA_TYPE_KEY - key of item from which identifies item DATA_TYPE (default value is type).
• KAFKA_DEFAULT_DATA_TYPE - default DATA_TYPE for crawled items without KAFKA_DATA_TYPE_KEY (default value is data).
• KAFKA_COMPRESSION_TYPE - type of data compression in kafka for example gzip.

CaptchaDetection

Captcha detection middleware for scrapy crawlers. It gets the HTML code from the response (if present), sends it to the captcha detection web-server and logs the result.

If you don't want to check exact response if it has captcha, provide meta-key dont_check_captcha with True value.

The middleware must be set up with higher precedence (lower number) than RetryMiddleware:

DOWNLOADER_MIDDLEWARES = {
    "crawler_utils.CaptchaDetectionDownloaderMiddleware": 549,  # By default, RetryMiddleware has 550
}

Middleware settings:

• ENABLE_CAPTCHA_DETECTOR: bool = True. Whether to enable captcha detection.
• CAPTCHA_SERVICE_URL: str. For an example: http://127.0.0.1:8000