Go package net/http for web scraping or spidering. Understanding of robots.txt

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  - gorilla/muxPackage gorilla/mux implements a request router and dispatcher for matching incoming requests to their respective handler. The name mux stands for “HTTP request multiplexer”. Like the standard http.ServeMux, mux.Router matches incoming requests against a list of registered routes and calls a handler for the route that matches the URL or other conditions. The main features are: It implements the http.Handler interface so it is compatible with the standard http.ServeMux. Requests can be matched based on URL host, path, path prefix, schemes, header and query values, HTTP methods or using custom matchers. URL hosts, paths and query values can have variables with an optional regular expression. Registered URLs can be built, or “reversed”, which helps maintaining references to resources. Routes can be used as subrouters: nested routes are only tested if the parent route matches. This is useful to define groups of routes that share common conditions like a host, a path prefix or other repeated attributes. As a bonus, this optimizes request matching.
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  - html/templatePackage template (html/template) implements data-driven templates for generating HTML output safe against code injection. It provides the same interface as package text/template and should be used instead of text/template whenever the output is HTML. The documentation here focuses on the security features of the package. For information about how to program the templates themselves, see the documentation for text/template.
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  - text/templatePackage template implements data-driven templates for generating textual output. To generate HTML output, see package html/template, which has the same interface as this package but automatically secures HTML output against certain attacks. Templates are executed by applying them to a data structure. Annotations in the template refer to elements of the data structure (typically a field of a struct or a key in a map) to control execution and derive values to be displayed. Execution of the template walks the structure and sets the cursor, represented by a period ‘.’ and called “dot”, to the value at the current location in the structure as execution proceeds. The input text for a template is UTF-8-encoded text in any format. “Actions”–data evaluations or control structures–are delimited by “{{” and “}}”; all text outside actions is copied to the output unchanged. Except for raw strings, actions may not span newlines, although comments can. Once parsed, a template may be executed safely in parallel, although if parallel executions share a Writer the output may be interleaved.
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https://support.google.com/webmasters/answer/6062608?hl=en

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Go package net/http for web scraping or spidering. Understanding of robots.txt

Published by Lim Shan Kuo on December 11, 2019December 11, 2019

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Go package net/http for web scraping or spidering. Understanding of robots.txt

Published by Lim Shan Kuo on December 11, 2019December 11, 2019

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My Go Tutorial

Go: Map

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TinyGO (Windows platform)