tool_cb_hdr: allow etag and content-disposition for 3xx reply

- Parse etag and content-disposition headers for 3xx replies.

For example, a server may send a content-disposition filename header
with a redirect reply (3xx) but not with the final response (2xx).
Without this change curl would ignore the server's specified filename
and continue to use the filename extracted from the user-specified URL.

Prior to this change, 75d79a4 had limited etag and content-disposition
to 2xx replies only.

Tests-by: Daniel Stenberg

Reported-by: Morgan Willcock
Fixes https://github.com/curl/curl/issues/13302
Closes #13484

src/tool_cb_hdr.c

@@ -118,8 +118,9 @@ size_t tool_header_cb(char *ptr, size_t size, size_t nmemb, void *userdata)
     long response = 0;
     curl_easy_getinfo(per->curl, CURLINFO_RESPONSE_CODE, &response);
 
-    if(response/100 != 2)
-      /* only care about these headers in 2xx responses */
+    if((response/100 != 2) && (response/100 != 3))
+      /* only care about etag and content-disposition headers in 2xx and 3xx
+         responses */
       ;
     /*
      * Write etag to file when --etag-save option is given.

tests/data/Makefile.inc

@@ -73,7 +73,7 @@ test426 test427 test428 test429 test430 test431 test432 test433 test434 \
 test435 test436 test437 test438 test439 test440 test441 test442 test443 \
 test444 test445 test446 test447 test448 test449 test450 test451 test452 \
 test453 test454 test455 test456 test457 test458 test459 test460 test461 \
-test462 test463 test467 test468 test469 test470 test471 test472 \
+test462 test463 test467 test468 test469 test470 test471 test472 test473 \
 \
 test490 test491 test492 test493 test494 test495 test496 test497 test498 \
 test499 test500 test501 test502 test503 test504 test505 test506 test507 \
@@ -189,6 +189,7 @@ test1455 test1456 test1457 test1458 test1459 test1460 test1461 test1462 \
 test1463 test1464 test1465 test1466 test1467 test1468 test1469 test1470 \
 test1471 test1472 test1473 test1474 test1475 test1476 test1477 test1478 \
 test1479 test1480 test1481 test1482 test1483 test1484 test1485 test1486 \
+test1487 \
 \
 test1500 test1501 test1502 test1503 test1504 test1505 test1506 test1507 \
 test1508 test1509 test1510 test1511 test1512 test1513 test1514 test1515 \

tests/data/test1487

@@ -0,0 +1,62 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP GET
+-J
+</keywords>
+</info>
+
+#
+<reply>
+<data nocheck="yes">
+HTTP/1.1 301 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 6
+Connection: close
+Content-Type: text/html
+Content-Disposition: filename=name%TESTNUMBER; charset=funny; option=strange
+
+12345
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+# this relies on the debug feature to allow us to set directory to store the
+# -J output in
+<features>
+debug
+</features>
+<server>
+http
+</server>
+<name>
+HTTP GET with -J and Content-Disposition on 301
+</name>
+<setenv>
+CURL_TESTDIR=%LOGDIR
+</setenv>
+<command option="no-output,no-include">
+http://%HOSTIP:%HTTPPORT/%TESTNUMBER -J -O
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+GET /%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+User-Agent: curl/%VERSION
+Accept: */*
+
+</protocol>
+<file name="%LOGDIR/name%TESTNUMBER">
+12345
+</file>
+
+</verify>
+</testcase>

tests/data/test473

@@ -0,0 +1,62 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP GET
+</keywords>
+</info>
+#
+# Server-side
+<reply>
+<data nocheck="yes">
+HTTP/1.1 301 funky chunky!
+Server: fakeit/0.9 fakeitbad/1.0
+Location: /redirected
+Transfer-Encoding: chunked
+Trailer: chunky-trailer
+Connection: mooo
+ETag: W/"asdf"
+
+40
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+30
+bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+21;heresatest=moooo
+cccccccccccccccccccccccccccccccc
+
+0
+chunky-trailer: header data
+
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+<name>
+Check if --etag-save saved correct etag to a file on 301
+</name>
+<command>
+http://%HOSTIP:%HTTPPORT/%TESTNUMBER --etag-save %LOGDIR/etag%TESTNUMBER
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+GET /%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+User-Agent: curl/%VERSION
+Accept: */*
+
+</protocol>
+<file name="%LOGDIR/etag%TESTNUMBER">
+W/"asdf"
+</file>
+</verify>
+
+</testcase>