What the data for this category looks like
Refining and chemical research report data comes from public reports from petroleum and petrochemical industry associations, special research reports from professional refining and chemical consulting institutions, quarterly disclosure documents of listed refining and chemical enterprises, and industry tracking data from commodity trading platforms. Update frequency is adjusted based on industry trends. Regular quarterly updates are provided, with ad-hoc updates added for major plant commissioning or policy adjustments. Document structure includes modules such as refining and chemical plant basic parameters, raw material procurement costs, product ex-factory prices, capacity utilization rates, and material balance data. For fields and units: Plant scale uses ten thousand tons per year as the unit, raw material costs use yuan per ton, capacity utilization rates use proportional coefficients, and product prices use yuan per barrel.
What constraints do these characteristics impose on the HTTP interfaces and external systems
Multiple data sources require the interface layer to support multi-agent configuration. This enables request routing and result aggregation across different data sources, preventing overall service disruption from single data source failures. The quarterly plus ad-hoc update schedule requires the interface to support incremental pull interfaces. This reduces bandwidth consumption and response time of full-volume requests, and adapts to rapid synchronization needs for ad-hoc updates. Specialized fields and differentiated units require the interface layer to include built-in field mapping and unit conversion logic. This adapts to the return formats of different data sources and simplifies field processing steps for external systems. Long individual research report content requires the interface to support pagination parameter configuration. This splits returned results, preventing external system processing failures caused by overloaded single return data.
How to set the configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
PROXY_POOL_ENABLED | true | Data sources for refining and chemical research reports are dispersed. Enabling the proxy pool enables load balancing for multi-source requests and avoids single proxy node performance lag. |
PROXY_REQUEST_TIMEOUT | 300 seconds | Individual refining and chemical research reports have large data volumes, and some data sources have slow responses. 300 seconds covers the full request cycle. |
INCREMENTAL_SYNC_INTERVAL | 86400 seconds | Within the regular quarterly update cycle, daily incremental pulls synchronize ad-hoc updated research report data in a timely manner. |
RESPONSE_PAGE_SIZE | 10–20 items | The number of items returned per page adapts to the pagination display logic of external systems and avoids overloaded single return data. |
UNIT_CONVERSION_SWITCH | Enabled | Different data sources have inconsistent unit formats. Enabling conversion unifies returned units and simplifies external system processing. |
FIELD_FILTER_PARAM | Determined through actual measurement and calibration | There are many fields in refining and chemical research reports. Specifying filter parameters as needed reduces redundant data transmission. |
The parameter values provided on this page are common recommended 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 your own samples before finalizing settings.
Three common configuration mistakes
- Phenomenon: The interface call returns an
EAI_AGAINerror log, prompting failure to resolve the target domain name. Cause: DNS caching rules for the proxy layer are not configured, and high-frequency requests trigger local DNS resolution timeouts. - Phenomenon: Single proxy node has consistently high load, causing interface response lag. Cause: Proxy pool load balancing configuration is not enabled, all external requests are routed to a single proxy node, exceeding the node's processing limit.
- Phenomenon: The unit formats of research report data received by external systems are inconsistent. Cause: The
UNIT_CONVERSION_SWITCHconfiguration is not enabled, and the unit output formats of different data sources are not unified.
How to confirm the configuration is complete
- Send a test request with specified filter fields, check if the returned results only include target fields to verify that the
FIELD_FILTER_PARAMconfiguration takes effect. - Simulate multiple concurrent external requests, observe the load distribution of proxy nodes, confirm that requests can be evenly distributed across multiple proxy nodes.
- Check the unit format of returned data, confirm it matches the preset unified units to verify that the
UNIT_CONVERSION_SWITCHconfiguration takes effect. - Check interface error logs, confirm that no
EAI_AGAINDNS resolution errors appear, verifying that the DNS caching configuration takes effect.
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.