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+Connection header
+=================
+
+## Proxy-Connection
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 200 OK
+Content-Type: text/html; charset=UTF-8
+Content-Length: 11
+Proxy-Connection: close
+Date: Thu, 31 Dec 2009 20:55:48 +0000
+
+hello world
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=2 span[status]="OK"
+off=17 status complete
+off=17 len=12 span[header_field]="Content-Type"
+off=30 header_field complete
+off=31 len=24 span[header_value]="text/html; charset=UTF-8"
+off=57 header_value complete
+off=57 len=14 span[header_field]="Content-Length"
+off=72 header_field complete
+off=73 len=2 span[header_value]="11"
+off=77 header_value complete
+off=77 len=16 span[header_field]="Proxy-Connection"
+off=94 header_field complete
+off=95 len=5 span[header_value]="close"
+off=102 header_value complete
+off=102 len=4 span[header_field]="Date"
+off=107 header_field complete
+off=108 len=31 span[header_value]="Thu, 31 Dec 2009 20:55:48 +0000"
+off=141 header_value complete
+off=143 headers complete status=200 v=1/1 flags=22 content_length=11
+off=143 len=11 span[body]="hello world"
+off=154 message complete
+```
+
+## HTTP/1.0 with keep-alive and EOF-terminated 200 status
+
+There is no `Content-Length` in this response, so even though the
+`keep-alive` is on - it should read until EOF.
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.0 200 OK
+Connection: keep-alive
+
+HTTP/1.0 200 OK
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.0"
+off=8 version complete
+off=13 len=2 span[status]="OK"
+off=17 status complete
+off=17 len=10 span[header_field]="Connection"
+off=28 header_field complete
+off=29 len=10 span[header_value]="keep-alive"
+off=41 header_value complete
+off=43 headers complete status=200 v=1/0 flags=1 content_length=0
+off=43 len=15 span[body]="HTTP/1.0 200 OK"
+```
+
+## HTTP/1.0 with keep-alive and 204 status
+
+Responses with `204` status cannot have a body.
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.0 204 No content
+Connection: keep-alive
+
+HTTP/1.0 200 OK
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.0"
+off=8 version complete
+off=13 len=10 span[status]="No content"
+off=25 status complete
+off=25 len=10 span[header_field]="Connection"
+off=36 header_field complete
+off=37 len=10 span[header_value]="keep-alive"
+off=49 header_value complete
+off=51 headers complete status=204 v=1/0 flags=1 content_length=0
+off=51 message complete
+off=51 reset
+off=51 message begin
+off=56 len=3 span[version]="1.0"
+off=59 version complete
+off=64 len=2 span[status]="OK"
+```
+
+## HTTP/1.1 with EOF-terminated 200 status
+
+There is no `Content-Length` in this response, so even though the
+`keep-alive` is on (implicitly in HTTP 1.1) - it should read until EOF.
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 200 OK
+
+HTTP/1.1 200 OK
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=2 span[status]="OK"
+off=17 status complete
+off=19 headers complete status=200 v=1/1 flags=0 content_length=0
+off=19 len=15 span[body]="HTTP/1.1 200 OK"
+```
+
+## HTTP/1.1 with 204 status
+
+Responses with `204` status cannot have a body.
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 204 No content
+
+HTTP/1.1 200 OK
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=10 span[status]="No content"
+off=25 status complete
+off=27 headers complete status=204 v=1/1 flags=0 content_length=0
+off=27 message complete
+off=27 reset
+off=27 message begin
+off=32 len=3 span[version]="1.1"
+off=35 version complete
+off=40 len=2 span[status]="OK"
+```
+
+## HTTP/1.1 with keep-alive disabled and 204 status in strict mode
+
+<!-- meta={"type": "response", "mode": "strict"} -->
+```http
+HTTP/1.1 204 No content
+Connection: close
+
+HTTP/1.1 200 OK
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=10 span[status]="No content"
+off=25 status complete
+off=25 len=10 span[header_field]="Connection"
+off=36 header_field complete
+off=37 len=5 span[header_value]="close"
+off=44 header_value complete
+off=46 headers complete status=204 v=1/1 flags=2 content_length=0
+off=46 message complete
+off=47 error code=5 reason="Data after `Connection: close`"
+```
+
+## HTTP/1.1 with keep-alive disabled, content-length, and in loose mode
+
+Parser should discard extra request in loose mode.
+
+<!-- meta={"type": "response", "mode": "loose"} -->
+```http
+HTTP/1.1 200 No content
+Content-Length: 5
+Connection: close
+
+2ad731e3-4dcd-4f70-b871-0ad284b29ffc
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=10 span[status]="No content"
+off=25 status complete
+off=25 len=14 span[header_field]="Content-Length"
+off=40 header_field complete
+off=41 len=1 span[header_value]="5"
+off=44 header_value complete
+off=44 len=10 span[header_field]="Connection"
+off=55 header_field complete
+off=56 len=5 span[header_value]="close"
+off=63 header_value complete
+off=65 headers complete status=200 v=1/1 flags=22 content_length=5
+off=65 len=5 span[body]="2ad73"
+off=70 message complete
+```
+
+## HTTP/1.1 with keep-alive disabled, content-length, and in strict mode
+
+Parser should discard extra request in strict mode.
+
+<!-- meta={"type": "response", "mode": "strict"} -->
+```http
+HTTP/1.1 200 No content
+Content-Length: 5
+Connection: close
+
+2ad731e3-4dcd-4f70-b871-0ad284b29ffc
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=10 span[status]="No content"
+off=25 status complete
+off=25 len=14 span[header_field]="Content-Length"
+off=40 header_field complete
+off=41 len=1 span[header_value]="5"
+off=44 header_value complete
+off=44 len=10 span[header_field]="Connection"
+off=55 header_field complete
+off=56 len=5 span[header_value]="close"
+off=63 header_value complete
+off=65 headers complete status=200 v=1/1 flags=22 content_length=5
+off=65 len=5 span[body]="2ad73"
+off=70 message complete
+off=71 error code=5 reason="Data after `Connection: close`"
+```
+
+## HTTP/1.1 with keep-alive disabled, content-length, and in lenient mode
+
+Parser should process extra request in lenient mode.
+
+<!-- meta={"type": "response-lenient-keep-alive"} -->
+```http
+HTTP/1.1 200 No content
+Content-Length: 5
+Connection: close
+
+2ad73HTTP/1.1 200 OK
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=10 span[status]="No content"
+off=25 status complete
+off=25 len=14 span[header_field]="Content-Length"
+off=40 header_field complete
+off=41 len=1 span[header_value]="5"
+off=44 header_value complete
+off=44 len=10 span[header_field]="Connection"
+off=55 header_field complete
+off=56 len=5 span[header_value]="close"
+off=63 header_value complete
+off=65 headers complete status=200 v=1/1 flags=22 content_length=5
+off=65 len=5 span[body]="2ad73"
+off=70 message complete
+off=70 reset
+off=70 message begin
+off=75 len=3 span[version]="1.1"
+off=78 version complete
+off=83 len=2 span[status]="OK"
+```
+
+## HTTP/1.1 with keep-alive disabled and 204 status in lenient mode
+
+<!-- meta={"type": "response-lenient-keep-alive"} -->
+```http
+HTTP/1.1 204 No content
+Connection: close
+
+HTTP/1.1 200 OK
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=10 span[status]="No content"
+off=25 status complete
+off=25 len=10 span[header_field]="Connection"
+off=36 header_field complete
+off=37 len=5 span[header_value]="close"
+off=44 header_value complete
+off=46 headers complete status=204 v=1/1 flags=2 content_length=0
+off=46 message complete
+off=46 reset
+off=46 message begin
+off=51 len=3 span[version]="1.1"
+off=54 version complete
+off=59 len=2 span[status]="OK"
+```
+
+## HTTP 101 response with Upgrade and Content-Length header
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 101 Switching Protocols
+Connection: upgrade
+Upgrade: h2c
+Content-Length: 4
+
+body\
+proto
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=19 span[status]="Switching Protocols"
+off=34 status complete
+off=34 len=10 span[header_field]="Connection"
+off=45 header_field complete
+off=46 len=7 span[header_value]="upgrade"
+off=55 header_value complete
+off=55 len=7 span[header_field]="Upgrade"
+off=63 header_field complete
+off=64 len=3 span[header_value]="h2c"
+off=69 header_value complete
+off=69 len=14 span[header_field]="Content-Length"
+off=84 header_field complete
+off=85 len=1 span[header_value]="4"
+off=88 header_value complete
+off=90 headers complete status=101 v=1/1 flags=34 content_length=4
+off=90 len=4 span[body]="body"
+off=94 message complete
+off=94 error code=22 reason="Pause on CONNECT/Upgrade"
+```
+
+## HTTP 101 response with Upgrade and Transfer-Encoding header
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 101 Switching Protocols
+Connection: upgrade
+Upgrade: h2c
+Transfer-Encoding: chunked
+
+2
+bo
+2
+dy
+0
+
+proto
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=19 span[status]="Switching Protocols"
+off=34 status complete
+off=34 len=10 span[header_field]="Connection"
+off=45 header_field complete
+off=46 len=7 span[header_value]="upgrade"
+off=55 header_value complete
+off=55 len=7 span[header_field]="Upgrade"
+off=63 header_field complete
+off=64 len=3 span[header_value]="h2c"
+off=69 header_value complete
+off=69 len=17 span[header_field]="Transfer-Encoding"
+off=87 header_field complete
+off=88 len=7 span[header_value]="chunked"
+off=97 header_value complete
+off=99 headers complete status=101 v=1/1 flags=21c content_length=0
+off=102 chunk header len=2
+off=102 len=2 span[body]="bo"
+off=106 chunk complete
+off=109 chunk header len=2
+off=109 len=2 span[body]="dy"
+off=113 chunk complete
+off=116 chunk header len=0
+off=118 chunk complete
+off=118 message complete
+off=118 error code=22 reason="Pause on CONNECT/Upgrade"
+```
+
+## HTTP 200 response with Upgrade header
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 200 OK
+Connection: upgrade
+Upgrade: h2c
+
+body
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=2 span[status]="OK"
+off=17 status complete
+off=17 len=10 span[header_field]="Connection"
+off=28 header_field complete
+off=29 len=7 span[header_value]="upgrade"
+off=38 header_value complete
+off=38 len=7 span[header_field]="Upgrade"
+off=46 header_field complete
+off=47 len=3 span[header_value]="h2c"
+off=52 header_value complete
+off=54 headers complete status=200 v=1/1 flags=14 content_length=0
+off=54 len=4 span[body]="body"
+```
+
+## HTTP 200 response with Upgrade header and Content-Length
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 200 OK
+Connection: upgrade
+Upgrade: h2c
+Content-Length: 4
+
+body
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=2 span[status]="OK"
+off=17 status complete
+off=17 len=10 span[header_field]="Connection"
+off=28 header_field complete
+off=29 len=7 span[header_value]="upgrade"
+off=38 header_value complete
+off=38 len=7 span[header_field]="Upgrade"
+off=46 header_field complete
+off=47 len=3 span[header_value]="h2c"
+off=52 header_value complete
+off=52 len=14 span[header_field]="Content-Length"
+off=67 header_field complete
+off=68 len=1 span[header_value]="4"
+off=71 header_value complete
+off=73 headers complete status=200 v=1/1 flags=34 content_length=4
+off=73 len=4 span[body]="body"
+off=77 message complete
+```
+
+## HTTP 200 response with Upgrade header and Transfer-Encoding
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 200 OK
+Connection: upgrade
+Upgrade: h2c
+Transfer-Encoding: chunked
+
+2
+bo
+2
+dy
+0
+
+
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=2 span[status]="OK"
+off=17 status complete
+off=17 len=10 span[header_field]="Connection"
+off=28 header_field complete
+off=29 len=7 span[header_value]="upgrade"
+off=38 header_value complete
+off=38 len=7 span[header_field]="Upgrade"
+off=46 header_field complete
+off=47 len=3 span[header_value]="h2c"
+off=52 header_value complete
+off=52 len=17 span[header_field]="Transfer-Encoding"
+off=70 header_field complete
+off=71 len=7 span[header_value]="chunked"
+off=80 header_value complete
+off=82 headers complete status=200 v=1/1 flags=21c content_length=0
+off=85 chunk header len=2
+off=85 len=2 span[body]="bo"
+off=89 chunk complete
+off=92 chunk header len=2
+off=92 len=2 span[body]="dy"
+off=96 chunk complete
+off=99 chunk header len=0
+off=101 chunk complete
+off=101 message complete
+```