What this category of data looks like
The data for coal transportation and sales declaration materials and file review primarily comes from internal transportation and sales management systems, weighing ledgers, purchase and sales contract databases, and tax declaration systems. The update cycle follows transportation and sales batches; review materials for each batch are generated upon completion of a cross-regional transportation and sales operation.
The document structure includes two parts: structured business fields and attachments. Structured fields include contract number, mine site name, shipped tonnage, transportation route, approval nodes, review opinions, and more. Units include tons, vehicle trips, dates, and RMB yuan. Attachments are mostly scanned weighing slips, contract PDFs, and similar file types.
What constraints these characteristics impose on HTTP interfaces and external systems
The large number of structured fields and fixed format requirements mean the interface must support field validity checks to prevent invalid data from entering the review process. The multi-attachment feature requires the interface to support large file transfers or external file references to avoid transmission timeouts. Data sources are scattered across multiple internal systems, so the interface must connect to multiple external data sources and handle cross-system data synchronization delays. The review process involves multi-node approval, so the processing time for a single request is long, requiring adaptation to long timeout scenarios.
Configuration settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
Authorization | Bearer {custom interface key} | Complies with FastGPT interface identity verification standards to ensure valid external system call permissions |
variables | Pass {"coal_batch_id": "batch number", "approval_stage": "current node"} | Binds coal transportation and sales-specific batches and approval nodes to enable precise matching of review materials |
responseData | Specify returning approval_status, batch_volume, attachment_urls | Only returns core fields required for review to reduce unnecessary data transmission overhead |
| Interface timeout period | 600–1200 seconds, calibrated based on actual testing | Coal transportation and sales review involves verification of multiple materials and cross-system data retrieval, requiring sufficient processing time |
| Attachment retrieval timeout | 300 seconds | Attachments such as coal transportation and sales weighing slips and contract scanned files are large in size, so configure file retrieval timeout separately |
| Request retry strategy | Retry 2 times, 30 second interval | Addresses occasional network fluctuations in external transportation and sales systems to reduce the probability of call failures |
Three common mistakes
- Scenario: The interface call disconnects automatically after more than 180 seconds, and no complete review results are returned. Cause: The interface timeout configuration was not adjusted, and the default FastGPT timeout duration was used, which cannot cover the processing cycle of multi-material review for coal transportation and sales.
- Scenario: An
Error: write EPROTerror is returned when connecting a third-party system to FastGPT. Cause: TheAuthorizationparameter was not configured correctly, or the key does not match FastGPT's interface verification rules, resulting in identity verification failure. - Scenario: The review results returned by the interface lack core business fields such as shipment volume and mine site name. Cause: The required fields were not specified in
responseData, or coal transportation and sales-specific batch data was not bound viavariables, resulting in returned data that does not meet business requirements.
How to confirm the configuration is correct
- Call the test interface, pass a real coal transportation and sales batch ID, and check that the return result has no identity verification errors to confirm that the
Authorizationconfiguration is effective. - View the
variablesbound fields returned by the interface, confirm that parameters such as batch number and approval node match the test data to ensure that the review logic matches. - Verify the fields returned by
responseData, confirm that they include core content required for this review such as shipment volume and approval status, and that the field format complies with coal transportation and sales business specifications. - Simulate a call request with large attachments, check whether the interface can normally retrieve scanned files from external systems, and there are no file transfer-related errors.
The values provided are common starting points and should be measured 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.