Comments (14)
pathmapper
commented on June 9, 2024
1
@jmckenna looks good, thank you!
ogrinfo -ro WFS:https://demo.mapserver.org/cgi-bin/wfs
INFO: Open of `WFS:https://demo.mapserver.org/cgi-bin/wfs'
using driver `WFS' successful.
Metadata:
ABSTRACT=This demonstration server showcases MapServer (www.mapserver.org) and its OGC support
PROVIDER_NAME=Gateway Geomatics
TITLE=WMS Demo Server for MapServer
1: ms:continents (title: World continents)
2: ms:cities (title: World cities)
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jratike80
commented on June 9, 2024
Testing with OSGeo4W and I get
ogrinfo -ro WFS:https://demo.mapserver.org/cgi-bin/wfs
INFO: Open of `WFS:https://demo.mapserver.org/cgi-bin/wfs'
using driver `WFS' successful.
Metadata:
ABSTRACT=This demonstration server showcases MapServer (www.mapserver.org) and its OGC support
PROVIDER_NAME=Gateway Geomatics
TITLE=WMS Demo Server for MapServer
1: ms:continents (title: World continents)
2: ms:cities (title: World cities)
Could I have a different curl version or what? I have
curl 8.1.2 (x86_64-pc-win32) libcurl/8.1.2 OpenSSL/1.1.1w zlib/1.2.12 WinIDN
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pathmapper
commented on June 9, 2024
Don't know the reason, for me it fails also with curl 7.81.0 from Ubuntu LTS.
It may be that you are using HTTP/1.1 instead of HTTP/2.
With HTTP/2 and latest curl 8.4.0 it fails:
docker run --rm curlimages/curl:8.4.0 -v https://demo.mapserver.org/cgi-bin/wfs
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pathmapper
commented on June 9, 2024
You may check which HTTP version you are using with
curl -v https://demo.mapserver.org/cgi-bin/wfs
For me it reports:
[...]
Using HTTP2, server supports multiplexing
[...]
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jratike80
commented on June 9, 2024
And for me curl reports
ALPN: offers http/1.1
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pathmapper
commented on June 9, 2024
Possible solutions I can think of are:
- fix the header issue
- disable http/2 for the demo server
- (as a workaround gdal could use the
--http1.1flag for curl requests to force http/1.1 but I don't think this should be done)
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jratike80
commented on June 9, 2024
This is new to me, but by reading the net I would expect seeing also h2 here, but I don't:
* ALPN: offers http/1.1
I have older curl version, maybe that's why.
EDIT
The curl in OSGeo4W seems to be compiled without http/2 support so my tests are useless.
EDIT 2
My Firefox is using HTTP/2 and it does not report errors. So it is not yet confirmed that the header is invalid.
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jratike80
commented on June 9, 2024
Maybe there is some connection to this issue curl/curl#9526.
Add the whole output of your curl --version
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pathmapper
commented on June 9, 2024
Maybe there is some connection to this issue curl/curl#9526.
No, this one is about a trailing whitespace in the header and shouldn't be an issue with curl >= 7.86.0 and nghttp2 >= 1.50.0, please see curl/curl#9526 (comment)
My Firefox is using HTTP/2 and it does not report errors.
Browsers seems to be less strict than curl.
So it is not yet confirmed that the header is invalid.
From curl/curl#12172 (comment)
RFC 9113 is clear on this: "Any message containing connection-specific header fields MUST be treated as malformed (Section 8.1.1)." (that is, Proxy-Connection, Keep-Alive, Transfer-Encoding, and Upgrade)
My understanding is that the issue is that the header content-type: text/html is present and thus the message is considered malformed.
Add the whole output of your
curl --version
It's in curl/curl#12172 which is linked above, please read this issue.
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rouault
commented on June 9, 2024
This is a known issue with the demo server: #6857 .
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pathmapper
commented on June 9, 2024
Thanks @rouault I must admit that I didn't search in the PRs before opening this issue.
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jmckenna
commented on June 9, 2024
@pathmapper I made many changes to the demo server for this, this was very tricky. (I also thanked the cURL dev for the recent change in cURL regarding this). Can you re-try your tests? Now (from another Ubuntu server with cURL-master) I get the following (note the message ALPN: server accepted h2 ):
curl -v https://demo.mapserver.org/cgi-bin/wfs
* Host demo.mapserver.org:443 was resolved.
* IPv6: (none)
* IPv4: 140.211.15.30
* Trying 140.211.15.30:443...
* Connected to demo.mapserver.org (140.211.15.30) port 443
* ALPN: curl offers h2,http/1.1
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* CAfile: /etc/ssl/certs/ca-certificates.crt
* CApath: /etc/ssl/certs
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
* TLSv1.3 (IN), TLS handshake, Finished (20):
* TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.3 (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN: server accepted h2
* Server certificate:
* subject: CN=demo.mapserver.org
* start date: Aug 25 02:35:37 2023 GMT
* expire date: Nov 23 02:35:36 2023 GMT
* subjectAltName: host "demo.mapserver.org" matched cert's "demo.mapserver.org"
* issuer: C=US; O=Let's Encrypt; CN=R3
* SSL certificate verify ok.
* using HTTP/2
* [HTTP/2] [1] OPENED stream for https://demo.mapserver.org/cgi-bin/wfs
* [HTTP/2] [1] [:method: GET]
* [HTTP/2] [1] [:scheme: https]
* [HTTP/2] [1] [:authority: demo.mapserver.org]
* [HTTP/2] [1] [:path: /cgi-bin/wfs]
* [HTTP/2] [1] [user-agent: curl/8.5.0-DEV]
* [HTTP/2] [1] [accept: */*]
> GET /cgi-bin/wfs HTTP/2
> Host: demo.mapserver.org
> User-Agent: curl/8.5.0-DEV
> Accept: */*
>
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* old SSL session ID is stale, removing
< HTTP/2 200
< server: nginx/1.18.0 (Ubuntu)
< date: Mon, 23 Oct 2023 17:57:39 GMT
< content-type: text/html
< vary: Accept-Encoding
< access-control-allow-origin: *
< front-end-https: on
<
<HTML>
<HEAD><TITLE>MapServer Message</TITLE></HEAD>
<BODY BGCOLOR="#FFFFFF">
loadParams(): Web application error. No query information to decode. QUERY_STRING is set, but empty.
* Connection #0 to host demo.mapserver.org left intact
Thanks for this nudge.
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jmckenna
commented on June 9, 2024
I've also now added a daily check to send a request looking for http2 on demo.mapserver.org, and if it fails an email notification will be sent (I've been already running similar checks for decades for these demo services). I think this will help.
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pathmapper
commented on June 9, 2024
For completeness with --debug on
ogrinfo -ro WFS:https://demo.mapserver.org/cgi-bin/wfs --debug on
WFS: https://demo.mapserver.org/cgi-bin/wfs?SERVICE=WFS&REQUEST=GetCapabilities
HTTP: Fetch(https://demo.mapserver.org/cgi-bin/wfs?SERVICE=WFS&REQUEST=GetCapabilities)
HTTP: libcurl/7.81.0 GnuTLS/3.7.3 zlib/1.2.11 brotli/1.0.9 zstd/1.4.8 libidn2/2.3.2 libpsl/0.21.0 (+libidn2/2.3.2) libssh/0.9.6/openssl/zlib nghttp2/1.43.0 librtmp/2.3 OpenLDAP/2.5.16
WFS: Paging support with page size 100
WFS: No ImplementsStandardJoins support
WFS: No transaction support
GDAL: GDALOpen(WFS:https://demo.mapserver.org/cgi-bin/wfs, this=0x55639abefcd0) succeeds as WFS.
INFO: Open of `WFS:https://demo.mapserver.org/cgi-bin/wfs'
using driver `WFS' successful.
Metadata:
ABSTRACT=This demonstration server showcases MapServer (www.mapserver.org) and its OGC support
PROVIDER_NAME=Gateway Geomatics
TITLE=WMS Demo Server for MapServer
OGR: GetLayerCount() = 2
HTTP: Fetch(https://demo.mapserver.org/cgi-bin/wfs?SERVICE=WFS&VERSION=2.0.0&REQUEST=DescribeFeatureType&TYPENAME=ms:continents,ms:cities)
1: ms:continents (title: World continents)
2: ms:cities (title: World cities)
GDAL: GDALClose(WFS:https://demo.mapserver.org/cgi-bin/wfs, this=0x55639abefcd0)
with
ogrinfo --version
GDAL 3.8.0dev-dd53b90c10, released 2023/10/19 (debug build)
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Related Issues (20)
- Some SVG files doesn't display in 8.x HOT 1
- Missing stripes of information in tile raster output HOT 2
- Data not always returned within bounding box HOT 8
- Line OUTLINEWIDTH attribute binding issues HOT 1
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- no crs output in geojson when reprojecting to epsg with inverted axes
- Zero-size SVG rendering : mapserv.fcgi crashes
- Add config file-level error redirection capability. HOT 4
- 8 bit rasters with color table can't use DATARANGE based on pixel value
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- Slower performance of JP2KAK in comparison with JP2OpenJPEG. HOT 11
- BoundingBox is wrong in wms getcapablites in 1.3.0 but correct in 1.1.0 HOT 6
- tileindex can't reach to jsonb - "Could not find attribute location->>'20m' in tileindex"
- Symlink_blank tag not working for the map server when configured for Azure blob
- Custom projections not supported via WFS HOT 2
- Whitespace in EXPRESSIONS added to SLD Filters
- Antimeridian BBOXes not supported by the OGC Features API
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- Authentication of users and access to data based on S3 keys provided through Run-time Substitution. HOT 3
- PHPScript HOT 2
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