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Fix #19294, Ruby NetHttpRequest improvements #20101

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9da94fb
Fix #19294, Ruby NetHttpRequest improvements
mschwager Jul 21, 2025
5192f31
Update expected test output
mschwager Jul 21, 2025
d8b9d4d
Add change-note
mschwager Jul 23, 2025
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Fix #19294, Ruby NetHttpRequest improvements
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@mschwager
mschwager committed Jul 21, 2025
commit 9da94fb880b13f60d087079cafe37184e22242ff
22 changes: 18 additions & 4 deletions ruby/ql/lib/codeql/ruby/frameworks/http_clients/NetHttp.qll
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Expand Up @@ -12,15 +12,22 @@ private import codeql.ruby.DataFlow
/**
* A `Net::HTTP` call which initiates an HTTP request.
* ```ruby
* # one-off request
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This file needs to be auto-formatted, using codeql query format --in-place NetHttp.qll.

* Net::HTTP.get("http://example.com/")
* Net::HTTP.post("http://example.com/", "some_data")
* req = Net::HTTP.new("example.com")
* response = req.get("/")
*
* # connection re-use
* Net::HTTP.start("http://example.com") do |http|
* http.get("/")
* end
Comment on lines +20 to +24
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@mschwager mschwager Jul 21, 2025 •
edited
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Note that technically Net::HTTP.new does not open/reuse connections/sessions: https://docs.ruby-lang.org/en/master/Net/HTTP.html#method-c-new

* ```
*/
class NetHttpRequest extends Http::Client::Request::Range instanceof DataFlow::CallNode {
private DataFlow::CallNode request;
private API::Node requestNode;
API::Node requestNode;
API::Node connectionNode;
private boolean returnsResponseBody;

NetHttpRequest() {
Expand All @@ -30,20 +37,27 @@ class NetHttpRequest extends Http::Client::Request::Range instanceof DataFlow::C
|
// Net::HTTP.get(...)
method in ["get", "get_response"] and
requestNode = API::getTopLevelMember("Net").getMember("HTTP").getReturn(method) and
connectionNode = API::getTopLevelMember("Net").getMember("HTTP") and
requestNode = connectionNode.getReturn(method) and
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You can move requestNode = connectionNode.getReturn(method) up after line 36, and then remove the three duplicated lines.

returnsResponseBody = true
or
// Net::HTTP.post(...).body
method in ["post", "post_form"] and
requestNode = API::getTopLevelMember("Net").getMember("HTTP").getReturn(method) and
connectionNode = API::getTopLevelMember("Net").getMember("HTTP") and
requestNode = connectionNode.getReturn(method) and
returnsResponseBody = false
or
// Net::HTTP.new(..).get(..).body
// Net::HTTP.start(..) do |http| http.get(..) end
method in [
"get", "get2", "request_get", "head", "head2", "request_head", "delete", "put", "patch",
"post", "post2", "request_post", "request"
] and
requestNode = API::getTopLevelMember("Net").getMember("HTTP").getInstance().getReturn(method) and
connectionNode = [
API::getTopLevelMember("Net").getMember("HTTP").getInstance(),
API::getTopLevelMember("Net").getMember("HTTP").getMethod("start").getBlock().getParameter(0)
] and
requestNode = connectionNode.getReturn(method) and
returnsResponseBody = false
)
}
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8 changes: 8 additions & 0 deletions ruby/ql/test/library-tests/frameworks/http_clients/NetHttp.rb
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Expand Up @@ -27,3 +27,11 @@ def get(domain, path)
get("example.com", "/").body

Net::HTTP.post(uri, "some_body") # note: response body not accessed

http = Net::HTTP.new("https://example.com")
root_get = Net::HTTP::Get.new("/")
http.request(root_get)
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This case was already detected without the above code modifications, but I wanted to make sure that request objects are also detected correctly.


Net::HTTP.start("https://example.com") do |http|
http.get("/")
end
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