content_encoding: rework zlib_inflate

- When zlib version is < 1.2.0.4, process gzip trailer before considering
extra data as an error.
- Inflate with Z_BLOCK instead of Z_SYNC_FLUSH to maximize correct data
and minimize corrupt data output.
- Do not try to restart deflate decompression in raw mode if output has
started or if the leading data is not available anymore.
- New test 232 checks inflating raw-deflated content.

Closes #2068

2 files changed, 203 insertions, 1 deletions

diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index c9e2dc2f6..d8721512d 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -45,7 +45,7 @@ test190 test191 test192 test193 test194 test195 test196 test197 test198 \
 test199 test200 test201 test202 test203 test204 test205 test206 test207 \
 test208 test209 test210 test211 test212 test213 test214 test215 test216 \
 test217 test218 test219 test220 test221 test222 test223 test224 test225 \
-test226 test227 test228 test229 test230 test231         test233 test234 \
+test226 test227 test228 test229 test230 test231 test232 test233 test234 \
 test235 test236 test237 test238 test239 test240 test241 test242 test243 \
 test244 test245 test246 test247 test248 test249 test250 test251 test252 \
 test253 test254 test255 test256 test257 test258 test259 test260 test261 \
diff --git a/tests/data/test232 b/tests/data/test232
new file mode 100644
index 000000000..d0860c616
--- /dev/null
+++ b/tests/data/test232
@@ -0,0 +1,202 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP GET
+compressed
+</keywords>
+</info>
+#
+# Server-side
+<reply>
+<data base64="yes">
+SFRUUC8xLjEgMjAwIE9LDQpEYXRlOiBNb24sIDI5IE5vdiAyMDA0IDIxOjU2OjUzIEdNVA0KU2Vy
+dmVyOiBBcGFjaGUvMS4zLjMxIChEZWJpYW4gR05VL0xpbnV4KSBtb2RfZ3ppcC8xLjMuMjYuMWEg
+UEhQLzQuMy45LTEgbW9kX3NzbC8yLjguMjAgT3BlblNTTC8wLjkuN2QgbW9kX3BlcmwvMS4yOQ0K
+VmFyeTogQWNjZXB0LUVuY29kaW5nDQpDb250ZW50LVR5cGU6IHRleHQvaHRtbDsgY2hhcnNldD1J
+U08tODg1OS0xDQpDb250ZW50LUVuY29kaW5nOiBkZWZsYXRlDQpDb250ZW50LUxlbmd0aDogMTI4
+Nw0KDQrdWNtu4zYQfTeQf2D91AK2brYTOXC0KHLZBM02wdoFuk8GLdE2G0kUSMq5PPTbO5QoibEc
+r3eDvgRIYnLmnMPhDEmTmXx6SmK0IVxQlp51XcvpIpKGLKLp6qx7M73r+/5o3He7n4LO5JeLu/PZ
+t/tLlHH2DwllP6ZCAhBNv01nl19Qdy1ldmrbS07EOiFYWimR9gKHDySN7GXS1zzRd6yhFcmoC6Jb
+WkEHocqm2k1vTqPAPXa9iW0YSkSEJZnjKCKAGI/9vuP3PRc5w1PHPfXGE9vwG4Q8Ux9R4DnOsO86
+fddHjnfqwc9AUyrEqzhSnJC5WDMugzDncR2OYW/jl3kcF3CE0wjFdNGmFhAdHhGhljpnSVJSUoIk
+Y7UAx/wZLRlHYUxJKvuCRgT99fUWSY5TsYSKWjCLRshQ3hkMogLhcgSlWqlwVd8ljYk46uRCddQY
+4jmV+MlCNxKJPMtAX6Dr2ey+V/yd9tAVtI86V0X74uZ81kOzy9s/L+Hz9uJ3gF3d3F72iuE/391f
+X36FNgzwSGKIqZTqZ0zInm7m0AoZe6BEFNooz2KGIxgCllqekKiZdQ9lWIhHxiPVhMjSPFkU9un0
+9qgTEi7pkoZQVzD9QTj4mChDgWo8wQjFtCAbGXsknERHncVzlaQekmvyZsarslhHndkaqAjD74Km
+ajMJSG2dapVgBpsOec5RJ8bpKscrIooYSLqhnKUJDCBAR5fQWBsbKnFM5fNchIyTYHTiD63RycTe
+sm+BM8JDkAwGlntsYCvzFhrm8wB7bWwgC5Ne1yzLY8ybsY5HY4hhCMt529MiVAO6A8t3XxFeh2I4
+ymCc0Su0EQ7HxbnhWyNnYuuO6ZmHLAddz6282vAKUw7iD2qMMYDIFyLkNJNwRIpgoE6H16YSBqVP
+w/Vc7eXggixxHsuJbRpLGNR/Xh1gGZQ92HloVielrdaLPbFbrEZszRLythAsYMpLFXV42iZD69YC
+jaZcvRwuB2CtpGiNyOLFO1wEwFpE0RqRF5odLgJgLaJojUi4hj1GYrY6XKqmaMFGopHlWXK4IIC1
+lKI1IhFZHC4CYC2iaI0IE0+HiwBYiyiaUS8RqfPyB2pWEqq6abqxzHMOaRMk0Ou36hqF2YgfKMlG
+VMXYCENE3RwOV1FoLVMQG52Ecs744UolXmtpslnXhAVVraBZemIKhxyk4MvNzP4bncPpASmjeYJu
+S8fErhAar76n5JyTmNSZa5nn+v4WnFiuZ8EF6Q33G2x1rzo5dvxRi1hdsNocdS/afXHaBSznYu+a
+zATOUQITXjM5l2v4qoactUwlEucSbjKiDqnsV93aoE9gnFISo6kkKXzDrya26WxRoEq76/7vAq8i
+oopsIFt0zmIS3D2mhNe4wlRFapuhVr1qCasveE4TmmJpzk5yuCEUtYGC1p2W1/OO97kHe7n7nK7v
+7+W6e8eFpbE/6r1u93i4zz3eS/bHe73OXrc7+k7c3wlsf2SD1tjl/W67/LAmMngywUMMrqO1Tm18
+RvI5I2ddTkJ4HSibeknVi7LBmRvZUUPtcuwk6nsLuE+Gqhg7XTuZxuOsRd1+uL3FlVSqDQV2uLOj
+X/Vt6redWiW23mkN4u28seLehuP/L2nOT2dsOHhnxtT76uMnyvUGI/cdmXqBp9jHz9LAc4Yn78jS
+NaFJhOOPn6jhcDTw3pGosA9PffEzeTIs+qyv/ysUdOpm89+x/wA=
+</data>
+
+<datacheck>
+HTTP/1.1 200 OK

+Date: Mon, 29 Nov 2004 21:56:53 GMT

+Server: Apache/1.3.31 (Debian GNU/Linux) mod_gzip/1.3.26.1a PHP/4.3.9-1 mod_ssl/2.8.20 OpenSSL/0.9.7d mod_perl/1.29

+Vary: Accept-Encoding

+Content-Type: text/html; charset=ISO-8859-1

+Content-Encoding: deflate

+Content-Length: 1287

+

+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE project-listing SYSTEM "http://freshmeat.net/backend/fm-projects-0.4.dtd">
+<project-listing>
+  <project>
+    <project_id>1612</project_id>
+    <date_added>1998-08-21 04:01:29</date_added>
+    <date_updated>2004-10-18 02:22:23</date_updated>
+    <projectname_short>curl</projectname_short>
+    <projectname_full>curl and libcurl</projectname_full>
+    <desc_short>Command line tool and library for client-side URL transfers.</desc_short>
+    <desc_full>curl and libcurl is a tool for transferring files

+using URL syntax. It supports HTTP, HTTPS, FTP,

+FTPS, DICT, TELNET, LDAP, FILE, and GOPHER, as

+well as HTTP-post, HTTP-put, cookies, FTP upload,

+resumed transfers, passwords, portnumbers, SSL

+certificates, Kerberos, and proxies. It is powered

+by libcurl, the client-side URL transfer library.

+There are bindings to libcurl for over 20

+languages and environments.

+</desc_full>
+    <vitality_score>5784.57</vitality_score>
+    <vitality_percent>3.16</vitality_percent>
+    <vitality_rank>169</vitality_rank>
+    <popularity_score>6594.54</popularity_score>
+    <popularity_percent>13.81</popularity_percent>
+    <popularity_rank>105</popularity_rank>
+    <rating>8.50</rating>
+    <rating_count>21</rating_count>
+    <rating_rank>183</rating_rank>
+    <subscriptions>323</subscriptions>
+    <branch_name>Default</branch_name>
+    <url_project_page>http://freshmeat.net/projects/curl/</url_project_page>
+    <url_homepage>http://freshmeat.net/redir/curl/1612/url_homepage/</url_homepage>
+    <url_tgz>http://freshmeat.net/redir/curl/1612/url_tgz/</url_tgz>
+    <url_bz2>http://freshmeat.net/redir/curl/1612/url_bz2/</url_bz2>
+    <url_zip>http://freshmeat.net/redir/curl/1612/url_zip/</url_zip>
+    <url_changelog>http://freshmeat.net/redir/curl/1612/url_changelog/</url_changelog>
+    <url_rpm>http://freshmeat.net/redir/curl/1612/url_rpm/</url_rpm>
+    <url_deb>http://freshmeat.net/redir/curl/1612/url_deb/</url_deb>
+    <url_osx>http://freshmeat.net/redir/curl/1612/url_osx/</url_osx>
+    <url_bsdport>http://freshmeat.net/redir/curl/1612/url_bsdport/</url_bsdport>
+    <url_purchase></url_purchase>
+    <url_cvs>http://freshmeat.net/redir/curl/1612/url_cvs/</url_cvs>
+    <url_list>http://freshmeat.net/redir/curl/1612/url_list/</url_list>
+    <url_mirror>http://freshmeat.net/redir/curl/1612/url_mirror/</url_mirror>
+    <url_demo></url_demo>
+    <license>MIT/X Consortium License</license>
+    <latest_release>
+      <latest_release_version>7.12.2</latest_release_version>
+      <latest_release_id>176085</latest_release_id>
+      <latest_release_date>2004-10-18 02:22:23</latest_release_date>
+    </latest_release>
+    <screenshot_thumb></screenshot_thumb>
+    <authors>
+      <author>
+        <author_name>Daniel Stenberg</author_name>
+        <author_url>http://freshmeat.net/~bagder/</author_url>
+        <author_role>Owner</author_role>
+      </author>
+    </authors>
+    <descriminators>
+      <trove_id>12</trove_id>
+      <trove_id>226</trove_id>
+      <trove_id>3</trove_id>
+      <trove_id>2</trove_id>
+      <trove_id>188</trove_id>
+      <trove_id>216</trove_id>
+      <trove_id>200</trove_id>
+      <trove_id>220</trove_id>
+      <trove_id>164</trove_id>
+      <trove_id>90</trove_id>
+      <trove_id>89</trove_id>
+      <trove_id>809</trove_id>
+      <trove_id>150</trove_id>
+      <trove_id>224</trove_id>
+      <trove_id>900</trove_id>
+      <trove_id>839</trove_id>
+    </descriminators>
+    <dependencies>
+      <dependency type="recommended">
+        <dependency_release_id>0</dependency_release_id>
+        <dependency_branch_id>7464</dependency_branch_id>
+        <dependency_project_id>7464</dependency_project_id>
+        <dependency_project_title>OpenSSL (Default)</dependency_project_title>
+      </dependency>
+      <dependency type="optional">
+        <dependency_release_id>0</dependency_release_id>
+        <dependency_branch_id>0</dependency_branch_id>
+        <dependency_project_id>7443</dependency_project_id>
+        <dependency_project_title>OpenLDAP</dependency_project_title>
+      </dependency>
+      <dependency type="optional">
+        <dependency_release_id>0</dependency_release_id>
+        <dependency_branch_id>0</dependency_branch_id>
+        <dependency_project_id>12351</dependency_project_id>
+        <dependency_project_title>zlib</dependency_project_title>
+      </dependency>
+      <dependency type="optional">
+        <dependency_release_id>0</dependency_release_id>
+        <dependency_branch_id>0</dependency_branch_id>
+        <dependency_project_id>32047</dependency_project_id>
+        <dependency_project_title>Heimdal</dependency_project_title>
+      </dependency>
+      <dependency type="optional">
+        <dependency_release_id>0</dependency_release_id>
+        <dependency_branch_id>0</dependency_branch_id>
+        <dependency_project_id>44532</dependency_project_id>
+        <dependency_project_title>c-ares</dependency_project_title>
+      </dependency>
+    </dependencies>
+  </project>
+</project-listing>
+</datacheck>
+
+</reply>
+
+#
+# Client-side
+<client>
+<features>
+libz
+</features>
+<server>
+http
+</server>
+ <name>
+HTTP GET deflate raw-compressed content
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/232 --compressed
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<strippart>
+s/^Accept-Encoding: .*/Accept-Encoding: xxx/
+</strippart>
+<protocol>
+GET /232 HTTP/1.1

+Host: %HOSTIP:%HTTPPORT

+Accept: */*

+Accept-Encoding: xxx
+

+</protocol>
+</verify>
+</testcase>