mime: latch last read callback status.

In case a read callback returns a status (pause, abort, eof,
error) instead of a byte count, drain the bytes read so far but
remember this status for further processing.
Takes care of not losing data when pausing, and properly resume a
paused mime structure when requested.
New tests 670-673 check unpausing cases, with easy or multi
interface and mime or form api.

Fixes #4813
Reported-by: MrdUkk on github
Closes #4833

6 files changed, 290 insertions, 0 deletions

diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index dfc74320e..39739e500 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -86,6 +86,7 @@ test635 test636 test637 test638 test639 test640 test641 test642 \
 test643 test644 test645 test646 test647 test648 test649 test650 test651 \
 test652 test653 test654 test655 test656 test658 test659 test660 test661 \
 test662 test663 \
+test670 test671 test672 test673 \
 \
 test700 test701 test702 test703 test704 test705 test706 test707 test708 \
 test709 test710 test711 test712 test713 test714 test715 test716 test717 \
diff --git a/tests/data/test644 b/tests/data/test644
index 4c9a501ed..256d3379a 100644
--- a/tests/data/test644
+++ b/tests/data/test644
@@ -50,6 +50,7 @@ Content-Type: multipart/form-data; boundary=----------------------------
 ------------------------------

 Content-Disposition: form-data; name="sendfile"; filename="postit2.c"

 

+
 </protocol>
 # CURLE_ABORTED_BY_CALLBACK (42)
 <errorcode>
diff --git a/tests/data/test670 b/tests/data/test670
new file mode 100644
index 000000000..19a51a4e0
--- /dev/null
+++ b/tests/data/test670
@@ -0,0 +1,72 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP POST
+MIME
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 200 OK

+Date: Thu, 09 Nov 2010 14:49:00 GMT

+Server: test-server/fake swsclose

+Connection: close

+Content-Type: text/html

+

+hello
+</data>
+<datacheck>
+HTTP/1.1 200 OK

+Date: Thu, 09 Nov 2010 14:49:00 GMT

+Server: test-server/fake swsclose

+Connection: close

+Content-Type: text/html

+

+hello
+</datacheck>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+# tool is what to use instead of 'curl'
+<tool>
+lib670
+</tool>
+
+ <name>
+Request pause from mime read callback: multi
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/670
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strippart>
+s/^--------------------------[a-z0-9]*/------------------------------/
+s/boundary=------------------------[a-z0-9]*/boundary=----------------------------/
+</strippart>
+<protocol>
+POST /670 HTTP/1.1

+Host: %HOSTIP:%HTTPPORT

+Accept: */*

+Content-Length: 142

+Content-Type: multipart/form-data; boundary=----------------------------

+

+------------------------------

+Content-Disposition: form-data; name="field"

+

+AB

+--------------------------------

+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test671 b/tests/data/test671
new file mode 100644
index 000000000..eada50a6e
--- /dev/null
+++ b/tests/data/test671
@@ -0,0 +1,72 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP POST
+MIME
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 200 OK

+Date: Thu, 09 Nov 2010 14:49:00 GMT

+Server: test-server/fake swsclose

+Connection: close

+Content-Type: text/html

+

+hello
+</data>
+<datacheck>
+HTTP/1.1 200 OK

+Date: Thu, 09 Nov 2010 14:49:00 GMT

+Server: test-server/fake swsclose

+Connection: close

+Content-Type: text/html

+

+hello
+</datacheck>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+# tool is what to use instead of 'curl'
+<tool>
+lib671
+</tool>
+
+ <name>
+Request pause from mime read callback: easy
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/671
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strippart>
+s/^--------------------------[a-z0-9]*/------------------------------/
+s/boundary=------------------------[a-z0-9]*/boundary=----------------------------/
+</strippart>
+<protocol>
+POST /671 HTTP/1.1

+Host: %HOSTIP:%HTTPPORT

+Accept: */*

+Content-Length: 142

+Content-Type: multipart/form-data; boundary=----------------------------

+

+------------------------------

+Content-Disposition: form-data; name="field"

+

+AB

+--------------------------------

+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test672 b/tests/data/test672
new file mode 100644
index 000000000..9c5f24556
--- /dev/null
+++ b/tests/data/test672
@@ -0,0 +1,72 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP POST
+FORM
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 200 OK

+Date: Thu, 09 Nov 2010 14:49:00 GMT

+Server: test-server/fake swsclose

+Connection: close

+Content-Type: text/html

+

+hello
+</data>
+<datacheck>
+HTTP/1.1 200 OK

+Date: Thu, 09 Nov 2010 14:49:00 GMT

+Server: test-server/fake swsclose

+Connection: close

+Content-Type: text/html

+

+hello
+</datacheck>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+# tool is what to use instead of 'curl'
+<tool>
+lib672
+</tool>
+
+ <name>
+Request pause from form read callback: multi
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/672
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strippart>
+s/^--------------------------[a-z0-9]*/------------------------------/
+s/boundary=------------------------[a-z0-9]*/boundary=----------------------------/
+</strippart>
+<protocol>
+POST /672 HTTP/1.1

+Host: %HOSTIP:%HTTPPORT

+Accept: */*

+Content-Length: 142

+Content-Type: multipart/form-data; boundary=----------------------------

+

+------------------------------

+Content-Disposition: form-data; name="field"

+

+AB

+--------------------------------

+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test673 b/tests/data/test673
new file mode 100644
index 000000000..efed2727b
--- /dev/null
+++ b/tests/data/test673
@@ -0,0 +1,72 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP POST
+FORM
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 200 OK

+Date: Thu, 09 Nov 2010 14:49:00 GMT

+Server: test-server/fake swsclose

+Connection: close

+Content-Type: text/html

+

+hello
+</data>
+<datacheck>
+HTTP/1.1 200 OK

+Date: Thu, 09 Nov 2010 14:49:00 GMT

+Server: test-server/fake swsclose

+Connection: close

+Content-Type: text/html

+

+hello
+</datacheck>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+# tool is what to use instead of 'curl'
+<tool>
+lib673
+</tool>
+
+ <name>
+Request pause from form read callback: easy
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/673
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strippart>
+s/^--------------------------[a-z0-9]*/------------------------------/
+s/boundary=------------------------[a-z0-9]*/boundary=----------------------------/
+</strippart>
+<protocol>
+POST /673 HTTP/1.1

+Host: %HOSTIP:%HTTPPORT

+Accept: */*

+Content-Length: 142

+Content-Type: multipart/form-data; boundary=----------------------------

+

+------------------------------

+Content-Disposition: form-data; name="field"

+

+AB

+--------------------------------

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