What the data for this category looks like
Railway operation declaration materials and file data mainly come from passenger declaration systems and freight planning declaration platforms of various railway stations and depots. Updates follow business batch cycles. Daily updates cover declaration files for the current day and the next 7 days. Each document includes two parts: structured fields and attachments. Structured fields include an 18-digit declaration number, alphanumeric train number, carrier date precise to the minute, and enum-formatted review status. Attachments are mostly PDF-format freight bills and ticket vouchers, with a per-attachment size range of 10–500 MB. Data updates status in real time as the business review process advances. A single batch pull usually covers the total daily declaration volume for a single station.
What constraints these characteristics impose on HTTP interfaces and external systems
The mixed structure of structured fields and large attachments requires interfaces to support both structured parameter passing and file upload functions, to avoid data parsing errors. The real-time update cadence requires interface call frequency to align with business nodes. For example, pull daily pending review files every 15 minutes, to avoid pulling expired or incomplete business data. Fixed field formats require interface request parameters to exactly match preset field names, otherwise data cannot be correctly identified. Railway system compliance requirements also mandate that interface authentication uses exclusive tokens to prevent leakage of sensitive operation information. This places clear constraints on the configuration of the Authorization parameter. In addition, the large per-batch data volume requires interfaces to support paginated pulls, to avoid single request timeouts or data truncation.
How to set the configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
Authorization | Fixed prefix plus railway system exclusive token, formatted as Bearer rail-XXXX-XXXX | Complies with railway system interface authentication specifications, ensures only authorized external systems can access sensitive operation data |
variables | Pass declaration number range, review status, carrier date range | Accurately filter target declaration files, reduce invalid data transmission volume |
| Maximum number of entries returned per single request | Top 200 entries | Matches the regular business volume of daily declaration files for a single railway station, avoids interface timeouts |
| Request timeout duration | 300–600 seconds | Adapts to processing durations for large file uploads and complex review data, prevents mid-process interruptions |
responseData | Only return declaration number, review status, attachment link fields | Reduces returned data volume, improves interface processing and parsing efficiency |
Reference only; verify against the target FastGPT release and deployment documentation.
Three common configuration mistakes
- Interface calls return 401 Unauthorized status code, or knowledge base search functions experience abnormal billing. Cause: The exclusive
Authorizationtoken for the railway system is not used, and a generic FastGPT token is mistakenly used, leading to authentication failure or incorrect billing matching. - The number of review data entries returned by the interface is far lower than expected. Cause: The carrier date or declaration number filter conditions in
variablesare not correctly configured, resulting in the pulling of file data beyond the target batch. - Interface timeout errors occur during large attachment uploads. Cause: The request timeout duration is set too short, and does not match the actual processing duration for large file transfers.
How to confirm the configuration is complete
- Call the configured interface, check if the returned
responseDatafields include expected structured content such as declaration numbers and review statuses. - Send a test request with the correct
Authorizationtoken, confirm that the returned status code is 200, with no authentication-related errors. - Upload a test attachment within the 10–500 MB range, confirm that the interface can normally receive the attachment and return a valid attachment link.
- Compare the pulled data volume with the filter conditions set in
variables, confirm that the returned results match the preset business scope.
The values provided here are common starting points, and should be evaluated against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.