HTTP Interfaces and External Systems for Infrastructure

What this category of data looks like

Infrastructure engineering research report data comes from multiple sources. These include public bid announcements from housing and urban-rural development departments, monthly special reports from industry associations, engineering plan documents from design institutes, and progress records from supervision parties. Data update rhythm aligns with project milestones. Bid information is pushed in real time. Industry research reports are updated monthly or quarterly. A single document typically includes these fields: project name, construction location, total investment amount, planned construction period, winning bid unit, core technical parameters, and compliance review opinions. Investment amount is measured in ten thousand yuan. Construction period uses natural days or months as units. Building area is measured in square meters.

Constraints imposed on HTTP interfaces and external systems

Real-time bid data updates for infrastructure engineering research reports require HTTP interfaces to support high-frequency concurrent calls. This prevents data synchronization delays caused by call rate limiting. The multi-field, specialized unit document structure requires interfaces to support custom field mapping and unit conversion configuration. This prevents mismatches between parameters received by external systems and internal storage formats. Mixed structured and unstructured document content requires interfaces to support both structured field extraction and full-text retrieval. This adapts to the call needs of different external systems. Project-level data correlation requirements mandate that interfaces support associative query of related research reports by project ID. This reduces secondary processing costs for external systems.

Configuration Settings

Configuration Item	Recommended Value	Rationale
`PARSE_FILE_TIMEOUT_SECONDS`	`600 seconds`	Infrastructure engineering research reports often contain multi-page drawings and long text, leading to long parsing times
`UPLOAD_FILE_MAX_SIZE`	`2000 MB`	Single engineering research reports may include high-definition drawing attachments, requiring support for large file uploads
`Recall count`	`top 8–12 results`	Relevance matching for infrastructure engineering research reports needs to cover references to similar projects, so the number of results should not be too low
`Similarity threshold`	`0.72–0.80`	Matching accuracy requirements for engineering technical parameters are high, so low-correlation results need to be filtered
`field_mapping_enable`	`enabled`	Fields such as research report investment amount and construction period need to be mapped to the standard field format of external systems
`re_rank_count`	`top 5 results`	Re-rank search results for core technical parameters to improve the accuracy of key information

The parameter values provided on this page are common starting points for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require specific analysis. It is recommended to test on your own samples before finalizing settings.

Three Common Mistakes

Phenomenon: A file upload interface call returns 400 Bad Request, and Chinese file names display garbled text. Cause: The Content-Type: multipart/form-data; charset=utf-8 header is not set in the HTTP request, leading to incorrect encoding of Chinese file names.
Phenomenon: The conversation interface returns 401 Unauthorized, and logs show that the Authorization field of the second request is empty or formatted incorrectly. Cause: After the first request's session times out, the external system does not resend the request with a valid API key, or the key configuration has an expiration risk.
Phenomenon: The research report retrieval interface returns results missing the investment_amount field. Cause: Structured field extraction is not enabled in the interface configuration. Only full-text retrieval is performed, and the corresponding field is not mapped.

How to Verify Correct Configuration

Send a large file upload request. Verify that engineering drawing attachments under 2000 MB can be uploaded and parsed normally.
Send an upload request with a research report file that has a Chinese file name. Check that the file name received by the external system has no garbled text.
Call the retrieval interface. Verify that the returned results include preset fields such as investment_amount and construction_period.
Simulate high-frequency concurrent requests. Confirm that the interface does not trigger rate limiting, and the latency of returned results meets business requirements.

Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.