What Data for This Category Looks Like
Data for industrial metals intelligent due diligence reports primarily comes from domestic and overseas futures exchanges, industry associations, and spot trading platforms. Two update schedules apply: futures market data is pushed in real time during trading hours, while spot prices and inventory data are updated daily. The structure of a single report document includes fields such as contract code, delivery grade, transaction price, inventory scale, import and export data, and more. Price fields mostly use yuan/ton or USD/ton as units, and inventory fields use tons. Some reports include detailed distribution of delivery warehouses. All data fields must match the standard formats publicly disclosed by exchanges.
Constraints Imposed by These Characteristics on HTTP Interfaces and External Systems
The characteristics of industrial metals data impose multiple constraints on interface calls. First, real-time futures market data requires interfaces to support high-frequency requests. Critical market data during trading hours may be missed if polling intervals are overly long. Second, data from multiple sources has inconsistent units. Unified unit conversion rules must be configured at the interface layer. This ensures that yuan/ton and USD/ton data from different channels can be standardized. In addition, structured fields such as delivery standards and warehouse details included in reports require the interface to return exact matching preset field names. This prevents errors in subsequent parsing. When pulling inventory or import and export data in batches, interface pagination parameters must be adapted. Failures caused by exceeding the data volume limit of a single request are avoided this way.
How to Configure Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
requestInterval | 10–30 seconds | The update frequency of industrial metals futures trading hour market data is 10-30 seconds. This interval balances data timeliness and the risk of interface rate limiting |
unifyUnitRule | Convert domestic data to yuan/ton, overseas data to USD/ton | Industrial metals data sources use mixed units. Unifying units simplifies subsequent report generation logic |
requiredResponseFields | ["symbol", "price", "inventory", "updateTime"] | Industrial metals due diligence reports rely on these core fields. Missing fields will result in incomplete core report information |
batchRequestSize | 50 items per request | Most industrial metals data interfaces have a single return limit of 50 items. Exceeding this limit will trigger response truncation or errors |
requestTimeout | 60 seconds | When pulling cross-data-source data in batches, 60 seconds covers most interface response durations. This avoids timeout interruptions |
authType | API_KEY authentication | Most industrial metals data interfaces use API_KEY authentication. This ensures the security of data 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. Specific issues require case-by-case analysis. It is recommended to test on local samples before finalizing settings.
Three Common Configuration Errors
- Phenomenon: Empty content is returned after calling an external data interface, with no valid business fields in the response body. Cause: The
unifyUnitRuleconversion rule is not configured. Non-standard unit data returned by the interface triggers parsing errors, resulting in an empty system response. - Phenomenon: A 429 status code error is triggered when pulling data in batches. Cause: The
requestIntervalis set too short. This exceeds the rate limiting threshold of the data interface, leading to request interception. - Phenomenon: Uploading due diligence report attachments fails. The interface prompts that the file is too large. Cause: The
UPLOAD_FILE_MAX_SIZEconfiguration is not adjusted. Delivery warehouse detail attachments for industrial metal reports often exceed the default limit.
How to Confirm Proper Configuration
- A test interface call to retrieve a single industrial metals data entry will verify that the response body includes the configured required fields, and that units match the preset rules.
- Batch requests may be initiated to confirm that pagination parameters function correctly. No data truncation or duplicate returns occur.
- High-frequency requests may be simulated to check that no rate limiting errors are triggered by the interface. The request interval is confirmed to meet interface requirements.
- A standard industrial metals report attachment may be uploaded to confirm that the upload process completes normally. No format or size limit errors are displayed.
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.