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https://issues.apache.org/jira/browse/HTTPCLIENT-2355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17914611#comment-17914611
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Oleg Kalnichevski commented on HTTPCLIENT-2355:
-----------------------------------------------
[~polybios] Please give new change-set a try
[https://github.com/apache/httpcomponents-client/compare/5.4.x...HTTPCLIENT-2355]
Oleg
> Error "Chunked transfer encoding not allowed for HTTP/1.0" with proxy and
> HttpClient 5.4
> ----------------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-2355
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2355
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient (classic)
> Affects Versions: 5.4.1
> Reporter: V. S.
> Priority: Major
> Fix For: 5.4.2, 5.5-alpha1
>
>
> Exception org.apache.hc.core5.http.ProtocolException: "Chunked transfer
> encoding not allowed for HTTP/1.0" is thrown when sending request through
> corporate proxy (using Spring's RestClient). That did not occur with
> HttpClient 5.3.
> Wire protocol (see below) shows proxy replies to CONNECT request with
> "HTTP/1.{*}0{*} 200 Connection Established". Since 5.4., this protocol
> version seems to be interpreted and set on the HTTP connection that is made
> after establishing the TLS connection through the TCP tunnel set up by the
> proxy.
> The corporate proxies are very hard to change to e.g. return "HTTP/1.{*}1{*}
> 200 ..." instead.
>
> *Wire protocol* (target and proxy host names have been replaced) :
> {{h.i.i.DefaultHttpClientConnectionOperator http-outgoing-0
> http://PROXY_HOST:8080 connected [...]}}
> {{h.i.i.PoolingHttpClientConnectionManager ep-0000000001 executing exchange
> ex-0000000001 over http-outgoing-0}}
> {{[...]}}
> {{org.apache.hc.client5.http.wire http-outgoing-0 >> "CONNECT
> TARGET_HOST:443 HTTP/1.1[\r][\n]"}}
> {{org.apache.hc.client5.http.wire http-outgoing-0 >> "Host
> TARGET_HOST:443[\r][\n]"}}
> {{org.apache.hc.client5.http.wire http-outgoing-0 >> "User-Agent:
> ApacheHttpClient/5.4.1 (Java/17.[...])[\r][\n]"}}
> {{org.apache.hc.client5.http.wire http-outgoing-0 >> "[\r][\n]"}}
> {{org.apache.hc.client5.http.wire http-outgoing-0 << "HTTP/1.0 200
> Connection Established[\r][\n]"}}
> {{org.apache.hc.client5.http.wire http-outgoing-0 << "[\r][\n]"}}
> {{[...]}}
> {{h.i.i.DefaultHttpClientConnectionOperator http-outgoing-0 upgrading to TLS
> TARGET_HOST:443}}
> {{[...]}}
> {{o.a.h.c.ssl.AbstractClientTlsStrategy Secure session established}}
> {{o.a.h.c.ssl.AbstractClientTlsStrategy negotiated protocol: TLSv1.3}}
> {{[...]}}
> {{h.i.i.DefaultHttpClientConnectionOperator http-outgoing-0 upgraded to TLS
> TARGET_HOST:443}}
> {{o.a.h.c.h.impl.classic.MainClientExec ex-0000000001 executing POST /path
> HTTP/1.1}}
> {{h.i.i.DefaultManagedHttpClientConnection http-outgoing-0 close connection
> IMMEDIATE }}
>
> *Stack trace:*
> {{org.apache.hc.core5.http.ProtocolException: Chunked transfer encoding not
> allowed for HTTP/1.0}}
> {{ at
> org.apache.hc.core5.http.protocol.RequestContent.process(RequestContent.java:127)
> ~[httpcore5-5.3.1.jar:5.3.1]}}
> {{ at
> org.apache.hc.core5.http.protocol.DefaultHttpProcessor.process(DefaultHttpProcessor.java:107)
> ~[httpcore5-5.3.1.jar:5.3.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.MainClientExec.execute(MainClientExec.java:119)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ConnectExec.execute(ConnectExec.java:199)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ProtocolExec.execute(ProtocolExec.java:192)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ContentCompressionExec.execute(ContentCompressionExec.java:150)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec.execute(HttpRequestRetryExec.java:113)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.RedirectExec.execute(RedirectExec.java:110)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.InternalHttpClient.doExecute(InternalHttpClient.java:174)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:87)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:55)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.apache.hc.client5.http.classic.HttpClient.executeOpen(HttpClient.java:183)
> ~[httpclient5-5.4.1.jar:5.4.1]}}
> {{ at
> org.springframework.http.client.HttpComponentsClientHttpRequest.executeInternal(HttpComponentsClientHttpRequest.java:99)
> ~[spring-web-6.2.1.jar:6.2.1] }}
>
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