A http retrieval method for csv fragments identified by uri

A fragment and identification technology, applied in the field of HTTP retrieval of CSV fragments, can solve problems such as no method or technical solution, and achieve the effect of saving network bandwidth and shortening communication delay

CN105045834BActive Publication Date: 2019-09-10HOHAI UNIV

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: HOHAI UNIV
Publication Date: 2019-09-10

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Abstract

The invention discloses an HTTP (Hyper Text Transport Protocol) retrieval method for a CSV (Comma-Separated Values) fragment marked by a URI (Uniform Resource Identifier). The HTTP retrieval method comprises the following steps that: a client resolves a fragment URI and obtains a main resource URI and a CSV fragment identifier; the client sends the selection mode and the selection range of the CSV fragment to a server; the server extracts the CSV fragment according to the selection mode and the selection range of the CSV fragment; the server returns the extracted CSV fragment to the client; and the client obtains the CSV fragment and displays or stores the CSV fragment. The HTTP retrieval method for the CSV fragment marked by the URI disclosed by the invention has the advantages that on one hand, the expansion on a current HTTP / 1.1 protocol is not needed; and on the other hand, the RFC 7111 international standard 'URI Fragment Identifiers for the Text / CSV Media Type' is supported, and compared with a conventional technical scheme of extracting the fragment after the client downloads a complete CSV file, the method provided by the invention has the advantages that the network bandwidth can be greatly reduced, and the communication time delay is reduced.

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Description

technical field

[0001] The invention relates to an HTTP retrieval method for network resources in the technical field of Internet communication, in particular to an HTTP retrieval method for a CSV fragment identified by a URI. Background technique

[0002] Open data movements in the fields of science and e-government have led to a dramatic increase in comma-separated values (comma-separated values, CSV) format tabular data (tabular data) on the World Wide Web (Web), and CSV files tend to have huge sizes (total number of bytes). This brings great challenges to web client applications that need to process or consume a portion of data or fragments in CSV files, because the complete CSV file is retrieved and downloaded from the server and then extracted. The traditional technical solutions of fragments require a large network bandwidth and time cost.

[0003] The format of using CSV files on the Web and its Internet media type (Internet media type) are regulated by RFC4180 (...

Claims

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