What Data for This Category Looks Like
Industrial metals marketing-related data primarily comes from domestic commodity trading platforms, global futures exchanges, and supply chain management systems. Data update schedules fall into two categories: futures market data is pushed on a scheduled basis per trading day. Spot prices and inventory data are updated hourly. Full-category supply and demand reports are released monthly.
The document structure follows a standardized format, including fields such as product code, standard grade, origin identifier, benchmark price, daily trading volume, total warehouse inventory, and more. Units are uniformly yuan/ton, ton, and lot (futures contract unit). Some segmented categories such as aluminum rods and copper wire will additionally include processing parameters like diameter and length.
What Constraints These Characteristics Impose on HTTP Interfaces and External Systems
External systems must support aggregated calls across multiple interfaces, due to the multi-source nature of industrial metals data. Configure cross-origin request processing rules to prevent cross-domain interception.
Use a caching policy of no more than 15 minutes for HTTP interfaces handling hourly updated spot data. This avoids frequent requests exceeding the rate limit thresholds of exchange interfaces.
Force mapping of standardized fields to uniform key names when interfaces return data. This prevents parsing errors caused by differing field names across data sources.
Clearly mark the lot unit for futures contracts and ton unit for spot goods during interface conversion. This avoids unit confusion in marketing content.
Configure chunked download interfaces for large-volume monthly supply and demand reports. This supports the needs of batch marketing material generation.
How to Set Configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
API_REQUEST_TIMEOUT | 600 seconds | Industrial metals monthly supply and demand reports have large data volumes; standard timeout durations are insufficient to complete full data retrieval |
CROSS_ORIGIN_ALLOW_ORIGINS | ["https://marketing-platform.example.com", "https://commodity-api.example.com"] | Opening corresponding domain permissions when connecting to multiple data source platforms prevents cross-domain interception |
CACHE_TTL | 900 seconds | Matches the hourly update cadence of spot data. A cache duration not exceeding the update interval avoids using expired data |
FIELD_MAPPING_RULE | Use the mapping {"price":"基准价格","volume":"当日成交量"} | Unify differences in field names across data sources, simplifying marketing content generation logic |
UNIT_CONVERSION_CONFIG | {"futures":"手","spot":"吨"} | Distinguishes unit standards for futures and spot goods, preventing unit confusion in marketing materials |
BATCH_DOWNLOAD_ENABLED | true | Supports chunked download requirements for large-volume monthly supply and demand report files |
The parameter values given on this page are common starting points. Actual values are affected by material form, data volume, and business rules. Specific issues require case-by-case analysis. It is recommended to test on your own samples before finalizing settings.
Three Common Mistakes
- The symptom is a 403 status code returned when calling the interface, with a prompt that cross-domain requests were intercepted. The cause is that the
CROSS_ORIGIN_ALLOW_ORIGINSparameter was not configured, and domain permissions for the marketing platform were not opened. - The symptom is expired spot price data returned after calling the interface, with field values showing data from 24 hours prior. The cause is that the
CACHE_TTLconfiguration exceeds one hour, failing to match the update cadence of spot data. - The symptom is failed third-party model interface calls when deploying version v4.8.21-fix locally. Logs show an API path error. The cause is that the
/v1path was not appended to the interface address, and the model API address was not correctly filled in the page configuration.
How to Confirm Correct Configuration
- Initiate a spot data interface request, and verify that the returned field names match the key names configured in
FIELD_MAPPING_RULE. - Check interface logs to confirm that the request source domain is in the
CROSS_ORIGIN_ALLOW_ORIGINSlist, with no interception records. - Verify the model connection configuration, confirming that the
/v1path is appended to the interface address, matching the currently deployed FastGPT version. - Pull a monthly supply and demand report, confirming that the chunked download function triggers normally, with files returned in segments without loss.
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.