blocks|key|1977199|text|是的，在Ruby的标准库中，你会发现一个完整的类模块，用于处理URI，其中有一个用于HTTP。您可以使用一些参数调用#build，就像您所展示的那样。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1977200|http://www.ruby-doc.org/stdlib/libdoc/uri/rdoc/classes/URI/HTTP.html#M009497|1977201|对于查询字符串本身，只需使用Rails的散列加法#to_query。即|1977202|uri+=+URI::HTTP.build(:host+=>+"www.google.com",+:query+=>+{+:q+=>+"test"+}.to_query)|code-block|syntax|javascript|1977203|entityMap|0|LINK|mutability|MUTABLE|url^0|1M|6|0|0|24|0|0|O|9|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|H|3|I|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|15|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|G]]]]

Yes, in Ruby's standard library you'll find a whole module of classes for working with URI's. There's one for HTTP. You can call <code>#build</code> with some arguments, much like you showed.

<a href="http://www.ruby-doc.org/stdlib/libdoc/uri/rdoc/classes/URI/HTTP.html#M009497" rel="noreferrer">http://www.ruby-doc.org/stdlib/libdoc/uri/rdoc/classes/URI/HTTP.html#M009497</a>

For the query string itself, just use Rails' Hash addition <code>#to_query</code>. i.e.

<pre><code>uri = URI::HTTP.build(:host =&gt; "www.google.com", :query =&gt; { :q =&gt; "test" }.to_query)
</code></pre>

blocks|key|1977224|text|晚了一步，但让我强烈推荐Addressable的宝石。除了它的其他有用的功能之外，它还支持通过RFC+6570+URI+templates编写和解析uri。要改编给定的示例，请尝试：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1977225|gsearch+=+Addressable::Template.new('http://google.com/{?query*}')
gsearch.expand(query:+{:q+=>+'hello+world'}).to_s
#+=>+"http://www.google.com/?q=hello%2520world"|code-block|syntax|javascript|1977226|或|1977227|gsearch+=+Addressable::Template.new('http://www.google.com/{?q}')
gsearch.expand(:q+=>+'hello+world').to_s
#+=>+"http://www.google.com/?q=hello%2520world"|1977228|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/sporkmonger/addressable|1|https://www.rfc-editor.org/rfc/rfc6570.txt^0|C|B|0|1B|M|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]|$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|14|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|15|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

Late to the party, but let me highly recommend the <a href="https://github.com/sporkmonger/addressable" rel="noreferrer">Addressable</a> gem. In addition to its other useful features, it supports writing and parsing uri's via <a href="https://www.rfc-editor.org/rfc/rfc6570.txt" rel="noreferrer">RFC 6570 URI templates</a>. To adapt the given example, try:

<pre class="lang-ruby prettyprint-override"><code>gsearch = Addressable::Template.new('http://google.com/{?query*}')
gsearch.expand(query: {:q =&gt; 'hello world'}).to_s
# =&gt; "http://www.google.com/?q=hello%20world"
</code></pre>

or

<pre><code>gsearch = Addressable::Template.new('http://www.google.com/{?q}')
gsearch.expand(:q =&gt; 'hello world').to_s
# =&gt; "http://www.google.com/?q=hello%20world"
</code></pre>

blocks|key|1763640|text|我推荐我的URL，它使得通过流畅的界面构建iri变得很容易：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1763641|require+'iri'
url+=+Iri.new('http://google.com/')
++.append('find').append('me')+#+->+http://google.com/find/me
++.add(q:+'books+about+OOP',+limit:+50)+#+->+?q=books%2Babout%2BOOP&limit=50
++.del(:q)+#+remove+this+query+parameter
++.del('limit')+#+remove+this+one+too
++.over(q:+'books+about+tennis',+limit:+10)+#+replace+these+params
++.scheme('https')+#+replace+'http'+with+'https'
++.host('localhost')+#+replace+the+host+name
++.port('443')+#+replace+the+port
++.path('/new/path')+#+replace+the+path+of+the+URI,+leaving+the+query+untouched
++.cut('/q')+#+replace+everything+after+the+host+and+port
++.to_s+#+convert+it+to+a+string|code-block|syntax|javascript|1763642|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/yegor256/iri^0|L|3|L|3|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

I would suggest my <a href="https://github.com/yegor256/iri" rel="nofollow noreferrer"><code>iri</code></a> gem, which makes it easy to build a URL through a fluent interface: 

<pre><code>require 'iri'
url = Iri.new('http://google.com/')
 .append('find').append('me') # -&gt; http://google.com/find/me
 .add(q: 'books about OOP', limit: 50) # -&gt; ?q=books+about+OOP&amp;limit=50
 .del(:q) # remove this query parameter
 .del('limit') # remove this one too
 .over(q: 'books about tennis', limit: 10) # replace these params
 .scheme('https') # replace 'http' with 'https'
 .host('localhost') # replace the host name
 .port('443') # replace the port
 .path('/new/path') # replace the path of the URI, leaving the query untouched
 .cut('/q') # replace everything after the host and port
 .to_s # convert it to a string
</code></pre>

blocks|key|1763667|text|对于香草红宝石，使用URI.encode_www_form|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1763668|require+'uri'
query+=+URI.encode_www_form({+:q+=>+"test"+})
url+=+URI::HTTP.build(:host+=>+"www.google.com",+query:+query).to_s
#=>+"http://www.google.com?q=test"|code-block|syntax|javascript|1763669|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.ruby-lang.org/en/2.6.0/URI.html#method-c-encode_www_form^0|A|J|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

With vanilla Ruby, use <a href="https://docs.ruby-lang.org/en/2.6.0/URI.html#method-c-encode_www_form" rel="nofollow noreferrer">URI.encode_www_form</a>:
<pre><code>require 'uri'
query = URI.encode_www_form({ :q =&gt; &quot;test&quot; })
url = URI::HTTP.build(:host =&gt; &quot;www.google.com&quot;, query: query).to_s
#=&gt; &quot;http://www.google.com?q=test&quot;
</code></pre>

Rails' URL generation mechanism (most of which routes through <code>polymorphic_url</code> at some point) allows for the passing of a hash that gets serialized into a query string at least for GET requests. What's the best way to get that sort of functionality, but on top of any base path?

For instance, I'd like to have something like the following:

<pre><code>generate_url('http://www.google.com/', :q =&gt; 'hello world')
 # =&gt; 'http://www.google.com/?q=hello+world'
</code></pre>

I could certainly write my own that strictly suits my application's requirements, but if there existed some canonical library to take care of it, I'd rather use that :).

Is there a Ruby library/gem that will generate a URL based on a set of parameters?

路由

Rails的URL生成机制(大多数在某个时刻通过polymorphic_url路由)允许传递散列，该散列被序列化为查询字符串，至少对于GET请求是这样。在任何基本路径之上，获得这种功能的最好方法是什么？例如，我希望拥有如下内容：generate_url('http://www.google.com/', :q => '...

问有没有Ruby库/gem可以根据一组参数生成URL？
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问有没有Ruby库/gem可以根据一组参数生成URL？
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