What the Data for This Category Looks Like
Carbon steel intelligent due diligence report data mainly comes from steel mill production ledgers, real-time quotes from spot trading platforms, and test reports from third-party quality inspection institutions. Update cadence: Spot price data is updated daily. Production batch data is synchronized with shipment schedules. Quality inspection reports are stored in the database immediately after each batch of products is produced. Documents typically include modules such as product specification parameter tables, chemical composition test tables, mechanical performance data tables, origin and quotation details, and batch ledgers. Fields include standardized content such as furnace number, thickness (mm), tensile strength (MPa), yield strength (MPa), delivery weight (tons), tax-included unit price (yuan/ton), and more. Some fields need to be adapted to internal coding rules of steel mills.
Constraints Imposed on HTTP Interfaces and External Systems
The multi-module table structure and multi-field attributes of carbon steel due diligence reports require interfaces to support large-volume file uploads and complex table parsing. Incomplete parsing may occur otherwise. The high-frequency update characteristic of spot data requires interfaces to support short-cache or no-cache modes. This avoids returning outdated quotation information. Multi-dimensional field verification requirements mean interface parameter verification rules must cover scenarios such as chemical composition ranges and unit consistency. Data errors may be introduced otherwise. The need to upload batch reports with long filenames requires interfaces to relax filename length limits. This prevents 400 errors from being triggered. Differences in fields across vendor data require interfaces to support custom field mapping configurations. This adapts to due diligence report formats from different steel mills.
How to Set Configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
UPLOAD_FILE_MAX_SIZE | 1000 MB | Carbon steel due diligence reports often include multiple quality inspection reports and ledger tables, resulting in large individual file sizes |
PARSE_TABLE_MAX_ROWS | 2000 rows | Carbon steel production ledgers and quotation tables often contain hundreds to thousands of data rows |
API_CACHE_TTL | 300 seconds | Carbon steel spot prices and production data are updated daily, so cache durations should not be too long |
REQUEST_TIMEOUT | 600 seconds | Large file parsing and multi-field verification take relatively long periods of time |
FIELD_VALIDATION_STRICT | Enabled | Carbon steel data fields such as chemical composition and specification parameters have clear compliance ranges, and strict verification can reduce invalid requests |
RESPONSE_INCLUDE_UNIT | Enabled | Carbon steel data must carry units such as MPa, yuan/ton to avoid field ambiguity |
The parameter values provided on this page are conventional recommendations used as starting points for configuration. Actual values are affected by material forms, data volumes, and business rules. Specific issues require targeted analysis, and it is recommended to test on your own samples before finalizing settings.
Three Common Misconfigurations
- A cross-origin error occurs when using the fetch API to call
/api/v1/chat/completions, with CORS-related errors shown in the browser console. The cause is failure to configure allowed request origins, request headers, or request methods on the backend, and failure to properly handle preflight requests. - A 400 error is returned when uploading a carbon steel due diligence report with an overly long filename. The cause is that the default filename length limit of the interface is 255 characters, and carbon steel reports often include long suffixes such as furnace numbers and batches that exceed this limit.
- Inserting images via Markdown fails to return accessible URL paths starting with
/api/system/img/. The cause is failure to configure the system storage path for image uploads, or failure to enable the switch for automatic upload to the specified directory.
How to Confirm Configurations Are Correct
- Initiate a test call with the
Originrequest header, check that the returned status code is 200 and there are no CORS-related errors, to confirm that cross-origin configuration is effective. - Upload a carbon steel due diligence report with a filename longer than 255 characters, check that the returned status code is 200 and the file is parsed successfully, to confirm that the filename length limit configuration is correct.
- Insert an image via Markdown and call the interface, check that the returned result includes a URL path with the
/api/system/img/prefix, to confirm that the image upload configuration is correct. - Call the voice upload interface and pass in a standard format audio file, check that the interface returns parsed text content, to confirm that the voice parsing configuration is effective.
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.