Real-time financial data collection: incremental crawling of SEC disclosure pages

Why do I have to use a proxy IP for financial data capture?

Engaged in financial data collection of the old iron know, the Securities and Futures Bureau website that anti-climbing mechanism than the security door is still tight. Last year, a buddy for three consecutive days with their own network to capture data, the results of the fourth day of the entire company's IP segment have been blacked out, the Ministry of Justice almost came to the door to check the water meter. At this time if you use theipipgos dynamic residential proxy, changing IPs is as easy as changing vests.

As a real example: a private equity organization is capturing disclosure documents from 20 provinces per day. They initially used single IP polling, which resulted in a pinch every 15 minutes. Then they switched toShort-lived proxy pool for ipipgoIf you are not able to do so, you will be able to collect the requests from the IPs of different regions, and the collection success rate will directly soar from 37% to 92%. Is this gap enough to illustrate the problem?

Core tips for incremental capture

Incremental capture is not a simple timed task, you have to play with the site update rhythm with. Here to share three practical points:

1. Time-stamp comparison method: Don't be stupid and download the full amount, first grab the page update time column. For example, if a provincial bureau updates every day at 4pm, then start the prep at 3:55 with theipipgo's pay-per-use IPsAdvance deployment of alternate routes in five different areas.

2. Document eigenvalue checking: The MD5 value of a PDF file is like an ID number. Last time there was a case, a document appears to be updated, the actual content of the text has not moved. With the feature value comparison can save 30% invalid traffic.

3. Abnormal fusion mechanisms: Switch immediately if 3 consecutive request failures are encounteredPremium static IPs from ipipgo. This feature was tested by our team and was able to compress the collection interruption time to less than 11 seconds.

Proxy IP anti-blocking configuration

Here's a configuration template we're using internally (note that punctuation is intentionally mistyped haha):

Special reminder: some provincial websites have requirements for IP affiliation. For example, some pages of Guangdong Bureau must use provincial IP to access the complete content. At this timeipipgo's city-level targeted IPIt comes in handy, picking Guangzhou and Shenzhen nodes to stabilize a bunch.

Frequently Asked Questions QA

Q: Why do I still get blocked with a proxy IP?
A: 80% of the data center IP is used, this kind of IP segment characteristics are too obvious. Switch toResidential agent for ipipgoThe IP pool is full of real user networks, and the anti-crawling system can't tell if it's a real person or a machine.

Q: How do I break the CAPTCHA when I encounter it?
A: Don't be hard-headed, switch IPs immediately!ipipgo's API to get new IPs in real time, 6 times faster than manually changing IP. This method is tested to bypass 90%'s image verification.

Q: What about transnational data collection?
A: Although this article does not discuss offshore access, a word of caution: the anti-crawl strategies of financial websites vary greatly from country to country. It is recommended to first useIP Quality Inspection Interface for ipipgoTest for availability, don't wait to get on the production line only to find out that the IPs are not compatible.

Finally, to say a big truth: do financial data collection in this business, the proxy IP is well chosen, go home early from work. Instead of anti-climbing mechanism on the dead beat, it is better to spend some cost to get a set of reliable IP program. LikeipipgoThis providesMillions of real residential IP poolsThe service providers who have used it say it really smells good - don't tell the competition haha!