What the data for this category looks like
The yield and market data for the chemical fiber industry comes from domestic public chemical fiber industry quotation platforms, transaction announcements from futures delivery warehouses, and ex-factory price notices from leading production enterprises. There are two update schedules for this data: Full daily datasets are updated at a fixed time after daily market close. High-frequency spot quotations are updated every 30 minutes. Data documents use standard JSON format. The top level includes request identifiers and data timestamps. Nested fields include category specifications, quotation types, values, units, and other information. Field units follow general industrial standards. Ex-factory quotations use yuan per ton as the unit. Transaction volumes use tons as the unit. Some sub-categories have physical property parameters with separate unit fields.
What constraints these characteristics impose on HTTP interfaces and external systems
Because there are two update schedules, interfaces must support pulling incremental data by timestamp. This avoids repeated pulling of full datasets and reduces bandwidth usage for external systems. Because fields include multi-layer nested specification and category information, external system parsing logic must adapt to nested field extraction rules. Target values cannot be obtained directly via flat field mapping. Because call frequency limits vary across data sources, the call interval for high-frequency data interfaces must match the data source's rate limiting rules. Otherwise, requests will be blocked. Because units follow general industrial standards, external systems do not need additional unit conversion. However, returned field unit consistency must be verified to avoid data calculation errors.
How to configure settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
api_request_interval | 30 seconds | Matches the update schedule of chemical fiber high-frequency data to avoid triggering data source rate limits |
response_parse_mode | Nested field extraction | Adapts to the nested JSON structure containing specifications and categories in chemical fiber data |
request_timeout | 10 seconds | Covers the average response time of chemical fiber data sources to prevent interrupted calls due to timeout |
filter_spec | Polyester filament, Polyamide chip | Limits the pull to specific specifications of target categories to reduce invalid returned data |
retry_on_failure | 3 retries, 2-second interval | Addresses occasional network fluctuations in chemical fiber data sources to improve call stability |
api_auth_type | API_KEY authentication | Complies with the authentication specifications of most chemical fiber industry data sources to secure interface calls |
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. Each scenario requires individual analysis. It is recommended to test with your own samples before finalizing settings.
Three common mistakes
- Receiving a
messages is emptyerror or an empty dataset after calling the HTTP interface. Target chemical fiber categories or specifications are not specified in the request parameters, so the data source does not return valid data. - Receiving a 429 Too Many Requests status code from the interface. The request interval is configured too short, exceeding the call frequency limit of the chemical fiber data source.
- Failing to obtain specific values for specification fields when parsing returned data. Nested field parsing mode is not enabled, so nested specification information in the JSON cannot be recognized.
How to confirm proper configuration
- Initiate a single test call and check if the returned data includes core quotation fields for the target chemical fiber category.
- Review call logs to confirm that the request interval complies with the data source's rate limiting requirements.
- Trigger a simulated timeout or network exception scenario to check if the retry mechanism executes as configured.
- Compare with the data source's official documentation to confirm that the returned field parsing rules match the configured settings.
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.