Merge pull request #12 from nathanaelhoun/custom-url-selfhosted

Use custom url for self-hosted

.goreleaser.yml

@@ -2,17 +2,44 @@ before:
   hooks:
     - go mod download
 builds:
-  - binary: ntfy
+  -
+    id: ntfy
+    binary: ntfy
     env:
       - CGO_ENABLED=1 # required for go-sqlite3
-    goos:
-      - linux
-    goarch:
-      - amd64
+    tags: [sqlite_omit_load_extension,osusergo,netgo]
+    ldflags:
+      - "-linkmode=external -extldflags=-static -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.Date}}"
+    goos: [linux]
+    goarch: [amd64]
+  -
+    id: ntfy_arm67
+    binary: ntfy
+    env:
+      - CGO_ENABLED=1 # required for go-sqlite3
+      - CC=arm-linux-gnueabi-gcc # apt install gcc-arm-linux-gnueabi
+    tags: [sqlite_omit_load_extension,osusergo,netgo]
+    ldflags:
+      - "-linkmode=external -extldflags=-static -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.Date}}"
+    goos: [linux]
+    goarch: [arm]
+    goarm:
+      - 6
+      - 7
+  -
+    id: ntfy_arm64
+    binary: ntfy
+    env:
+      - CGO_ENABLED=1 # required for go-sqlite3
+      - CC=aarch64-linux-gnu-gcc # apt install gcc-aarch64-linux-gnu
+    tags: [sqlite_omit_load_extension,osusergo,netgo]
+    ldflags:
+      - "-linkmode=external -extldflags=-static -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.Date}}"
+    goos: [linux]
+    goarch: [arm64]
 nfpms:
   -
     package_name: ntfy
-    file_name_template: "{{ .ProjectName }}_{{ .Version }}_{{ .Arch }}"
     homepage: https://heckel.io/ntfy
     maintainer: Philipp C. Heckel <philipp.heckel@gmail.com>
     description: Simple pub-sub notification service
@@ -54,6 +81,8 @@ dockers:
   - dockerfile: Dockerfile
     ids:
       - ntfy
+    goos: linux
+    goarch: amd64
     image_templates:
       - "binwiederhier/ntfy:latest"
       - "binwiederhier/ntfy:{{ .Tag }}"

LICENSE.GPLv2

@@ -0,0 +1,340 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
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+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
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+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
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+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
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+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
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+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
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+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
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+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
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+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
+

Makefile

@@ -61,6 +61,7 @@ coverage-html:
 coverage-upload:
 	cd build/coverage && (curl -s https://codecov.io/bash | bash)
 
+
 # Lint/formatting targets
 
 fmt:
@@ -84,21 +85,27 @@ staticcheck: .PHONY
 	PATH="$(PWD)/build/staticcheck:$(PATH)" staticcheck ./...
 	rm -rf build/staticcheck
 
+
 # Building targets
 
-build: .PHONY
-	goreleaser build --rm-dist
+build-deps: .PHONY
+	which arm-linux-gnueabi-gcc || { echo "ERROR: ARMv6/v7 cross compiler not installed. On Ubuntu, run: apt install gcc-arm-linux-gnueabi"; exit 1; }
+	which aarch64-linux-gnu-gcc || { echo "ERROR: ARM64 cross compiler not installed. On Ubuntu, run: apt install gcc-aarch64-linux-gnu"; exit 1; }
 
-build-snapshot:
-	goreleaser build --snapshot --rm-dist
+build: build-deps
+	goreleaser build --rm-dist --debug
+
+build-snapshot: build-deps
+	goreleaser build --snapshot --rm-dist --debug
 
 build-simple: clean
 	mkdir -p dist/ntfy_linux_amd64
 	export CGO_ENABLED=1
 	$(GO) build \
 		-o dist/ntfy_linux_amd64/ntfy \
+		-tags sqlite_omit_load_extension,osusergo,netgo \
 		-ldflags \
-		"-s -w -X main.version=$(VERSION) -X main.commit=$(shell git rev-parse --short HEAD) -X main.date=$(shell date +%s)"
+		"-linkmode=external -extldflags=-static -s -w -X main.version=$(VERSION) -X main.commit=$(shell git rev-parse --short HEAD) -X main.date=$(shell date +%s)"
 
 clean: .PHONY
 	rm -rf dist build
@@ -106,11 +113,11 @@ clean: .PHONY
 
 # Releasing targets
 
-release:
-	goreleaser release --rm-dist
+release: build-deps
+	goreleaser release --rm-dist --debug
 
-release-snapshot:
-	goreleaser release --snapshot --skip-publish --rm-dist
+release-snapshot: build-deps
+	goreleaser release --snapshot --skip-publish --rm-dist --debug
 
 
 # Installing targets

README.md

@@ -2,7 +2,7 @@
 
 # ntfy.sh | simple HTTP-based pub-sub
 
-**Ntfy** (pronounce: *notify*) is a simple HTTP-based [pub-sub](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern) notification service.
+**ntfy** (pronounce: *notify*) is a simple HTTP-based [pub-sub](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern) notification service.
 It allows you to **send notifications to your phone or desktop via scripts** from any computer, entirely **without signup or cost**.
 It's also open source (as you can plainly see) if you want to run your own.
 
@@ -136,19 +136,29 @@ sudo apt install ntfy
 
 **Debian/Ubuntu** (*manual install*)**:**
 ```bash
-sudo apt install tmux
-wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.0/ntfy_1.3.0_amd64.deb
-dpkg -i ntfy_1.4.0_amd64.deb
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_amd64.deb
+dpkg -i ntfy_1.4.6_amd64.deb
 ```
 
 **Fedora/RHEL/CentOS:**
 ```bash
-rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.4.0/ntfy_1.3.0_amd64.rpm
+rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_amd64.rpm
 ```
 
 **Docker:**
+Without cache:
+```
+docker run -p 80:80 -it binwiederhier/ntfy
+```
+
+With cache:
 ```bash
-docker run --rm -it binwiederhier/ntfy
+docker run \
+  -v /var/cache/ntfy:/var/cache/ntfy \
+  -p 80:80 \
+  -it \
+  binwiederhier/ntfy \
+    --cache-file /var/cache/ntfy/cache.db
 ```
 
 **Go:**
@@ -156,15 +166,27 @@ docker run --rm -it binwiederhier/ntfy
 go get -u heckel.io/ntfy
 ```
 
-**Manual install** (*any x86_64-based Linux*)**:**
+**Manual install:**
 ```bash
-wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.0/ntfy_1.3.0_linux_x86_64.tar.gz
-sudo tar -C /usr/bin -zxf ntfy_1.4.0_linux_x86_64.tar.gz ntfy
+# x86_64/amd64
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_linux_x86_64.tar.gz
+
+# ARMv6
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_linux_armv6.tar.gz
+
+# ARMv7
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_linux_armv7.tar.gz
+
+# arm64
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_linux_arm64.tar.gz
+
+# Extract and run
+sudo tar -C /usr/bin -zxf ntfy_1.4.6_linux_x86_64.tar.gz ntfy
 ./ntfy
 ```
 
 ## Building
-Building ntfy is simple. Here's how you do it:
+Building `ntfy` is simple. Here's how you do it:
 
 ```
 make build-simple
@@ -174,15 +196,12 @@ make build-simple
 To build releases, I use [GoReleaser](https://goreleaser.com/). If you have that installed, you can run `make build` or
 `make build-snapshot`.
 
-## TODO
-- add HTTPS
-- make limits configurable
-
 ## Contributing
 I welcome any and all contributions. Just create a PR or an issue.
 
 ## License
-Made with ❤️ by [Philipp C. Heckel](https://heckel.io), distributed under the [Apache License 2.0](LICENSE).
+Made with ❤️ by [Philipp C. Heckel](https://heckel.io).   
+The project is dual licensed under the [Apache License 2.0](LICENSE) and the [GPLv2 License](LICENSE.GPLv2).
 
 Third party libraries and resources:
 * [github.com/urfave/cli/v2](https://github.com/urfave/cli/v2) (MIT) is used to drive the CLI
@@ -192,3 +211,4 @@ Third party libraries and resources:
 * [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3) (MIT) is used to provide the persistent message cache
 * [Firebase Admin SDK](https://github.com/firebase/firebase-admin-go) (Apache 2.0) is used to send FCM messages
 * [Lightbox with vanilla JS](https://yossiabramov.com/blog/vanilla-js-lightbox) 
+* [Statically linking go-sqlite3](https://www.arp242.net/static-go.html)

server/cache_sqlite.go

@@ -68,6 +68,9 @@ func (c *sqliteCache) Messages(topic string, since sinceTime) ([]*message, error
 		if err := rows.Scan(&id, &timestamp, &msg); err != nil {
 			return nil, err
 		}
+		if msg == "" {
+			msg = " " // Hack: never return empty messages; this should not happen
+		}
 		messages = append(messages, &message{
 			ID:      id,
 			Time:    timestamp,

server/index.gohtml

@@ -60,20 +60,26 @@
 
     <h2 id="publish" class="anchor">Publishing messages</h2>
     <p>
-        Publishing messages can be done via PUT or POST using. Topics are created on the fly by subscribing or publishing to them.
+        Publishing messages can be done via PUT or POST. Topics are created on the fly by subscribing or publishing to them.
         Because there is no sign-up, <b>the topic is essentially a password</b>, so pick something that's not easily guessable.
     </p>
     <p class="smallMarginBottom">
-        Here's an example showing how to publish a message using <tt>curl</tt>:
+        Here's an example showing how to publish a message using <tt>curl</tt> (via POST):
     </p>
     <code>
-        curl -d "long process is done" ntfy.sh/mytopic
+        curl -d "Backup successful 😀" <span class="ntfyUrl">ntfy.sh</span>/mytopic
+    </code>
+    <p class="smallMarginBottom">
+        And another one using PUT:
+    </p>
+    <code>
+        echo -en "\u26A0\uFE0F Unauthorized login" | curl -sT- <span class="ntfyUrl">ntfy.sh</span>/mytopic
     </code>
     <p class="smallMarginBottom">
         Here's an example in JS with <tt>fetch()</tt> (see <a href="https://github.com/binwiederhier/ntfy/tree/main/examples">full example</a>):
     </p>
     <code>
-        fetch('https://ntfy.sh/mytopic', {<br/>
+        fetch('https://<span class="ntfyUrl">ntfy.sh</span>/mytopic', {<br/>
         &nbsp;&nbsp;method: 'POST', // PUT works too<br/>
         &nbsp;&nbsp;body: 'Hello from the other side.'<br/>
         })
@@ -121,7 +127,7 @@
         notifications like this (see <a href="example.html">live example</a>):
     </p>
     <code>
-        const eventSource = new EventSource('https://ntfy.sh/mytopic/sse');<br/>
+        const eventSource = new EventSource('<span class="ntfyProtocol">https://</span><span class="ntfyUrl">ntfy.sh</span>/mytopic/sse');<br/>
         eventSource.onmessage = (e) => {<br/>
         &nbsp;&nbsp;// Do something with e.data<br/>
         };
@@ -130,7 +136,7 @@
         You can also use the same <tt>/sse</tt> endpoint via <tt>curl</tt> or any other HTTP library:
     </p>
     <code>
-        $ curl -s ntfy.sh/mytopic/sse<br/>
+        $ curl -s <span class="ntfyUrl">ntfy.sh</span>/mytopic/sse<br/>
         event: open<br/>
         data: {"id":"weSj9RtNkj","time":1635528898,"event":"open","topic":"mytopic"}<br/><br/>
 
@@ -143,7 +149,7 @@
         To consume JSON instead, use the <tt>/json</tt> endpoint, which prints one message per line:
     </p>
     <code>
-        $ curl -s ntfy.sh/mytopic/json<br/>
+        $ curl -s <span class="ntfyUrl">ntfy.sh</span>/mytopic/json<br/>
         {"id":"SLiKI64DOt","time":1635528757,"event":"open","topic":"mytopic"}<br/>
         {"id":"hwQ2YpKdmg","time":1635528741,"event":"message","topic":"mytopic","message":"Hi!"}<br/>
         {"id":"DGUDShMCsc","time":1635528787,"event":"keepalive","topic":"mytopic"}
@@ -152,7 +158,7 @@
         Or use the <tt>/raw</tt> endpoint if you need something super simple (empty lines are keepalive messages):
     </p>
     <code>
-        $ curl -s ntfy.sh/mytopic/raw<br/>
+        $ curl -s <span class="ntfyUrl">ntfy.sh</span>/mytopic/raw<br/>
         <br/>
         This is a notification<br/>
         And another one with a smiley face 😀
@@ -167,7 +173,7 @@
         cached messages).
     </p>
     <code>
-        curl -s "ntfy.sh/mytopic/json?since=10m"
+        curl -s "<span class="ntfyUrl">ntfy.sh</span>/mytopic/json?since=10m"
     </code>
 
     <h3 id="polling" class="anchor">Polling (<tt>poll=1</tt>)</h3>
@@ -177,7 +183,7 @@
         combined with <tt>since=</tt> (defaults to <tt>since=all</tt>).
     </p>
     <code>
-        curl -s "ntfy.sh/mytopic/json?poll=1"
+        curl -s "<span class="ntfyUrl">ntfy.sh</span>/mytopic/json?poll=1"
     </code>
 
     <h3 id="multiple-topics" class="anchor">Subscribing to multiple topics (<tt>topic1,topic2,...</tt>)</h3>
@@ -186,7 +192,7 @@
         comma-separated list of topics in the URL. This allows you to reduce the number of connections you have to maintain:
     </p>
     <code>
-        $ curl -s ntfy.sh/mytopic1,mytopic2/json<br/>
+        $ curl -s <span class="ntfyUrl">ntfy.sh</span>/mytopic1,mytopic2/json<br/>
         {"id":"0OkXIryH3H","time":1637182619,"event":"open","topic":"mytopic1,mytopic2,mytopic3"}<br/>
         {"id":"dzJJm7BCWs","time":1637182634,"event":"message","topic":"mytopic1","message":"for topic 1"}<br/>
         {"id":"Cm02DsxUHb","time":1637182643,"event":"message","topic":"mytopic2","message":"for topic 2"}
@@ -208,8 +214,8 @@
     <code>
         rsync -a root@laptop /backups/laptop \<br/>
         &nbsp;&nbsp;&& zfs snapshot ... \<br/>
-        &nbsp;&nbsp;&& curl -d "Laptop backup succeeded" ntfy.sh/backups \<br/>
-        &nbsp;&nbsp;|| echo -en "\u26A0\uFE0F Laptop backup failed" | curl -sT- ntfy.sh/backups
+        &nbsp;&nbsp;&& curl -d "Laptop backup succeeded" <span class="ntfyUrl">ntfy.sh</span>/backups \<br/>
+        &nbsp;&nbsp;|| echo -en "\u26A0\uFE0F Laptop backup failed" | curl -sT- <span class="ntfyUrl">ntfy.sh</span>/backups
     </code>
 
     <h3 id="example-web" class="anchor">Example: Server-sent messages in your web app</h3>
@@ -236,7 +242,7 @@
     <code>
         #!/bin/bash<br/>
         if [ "${PAM_TYPE}" = "open_session" ]; then<br/>
-        &nbsp;&nbsp;echo -en "\u26A0\uFE0F SSH login: ${PAM_USER} from ${PAM_RHOST}" | curl -T- ntfy.sh/alerts<br/>
+        &nbsp;&nbsp;echo -en "\u26A0\uFE0F SSH login: ${PAM_USER} from ${PAM_RHOST}" | curl -T- <span class="ntfyUrl">ntfy.sh</span>/alerts<br/>
         fi
     </code>
 
@@ -247,8 +253,8 @@
     </p>
     <code>
         while read result; do<br/>
-        &nbsp;&nbsp;[ -n "$result" ] && echo "result" >> results.csv<br/>
-        done < <(stdbuf -i0 -o0 curl -s ntfy.sh/results/raw)
+        &nbsp;&nbsp;[ -n "$result" ] && echo "$result" >> results.csv<br/>
+        done < <(stdbuf -i0 -o0 curl -s <span class="ntfyUrl">ntfy.sh</span>/results/raw)
     </code>
 
     <h2 id="faq" class="anchor">FAQ</h2>
@@ -325,7 +331,7 @@
             To send notifications to it, simply PUT or POST to the topic URL. Here's an example using <tt>curl</tt>:
         </p>
         <code>
-            curl -d "Backup failed" <span id="detailTopicUrl"></span>
+            curl -d "Backup failed" <span id="detailTopicUrl">ntfy.sh/topic</span>
         </code>
         <p id="detailNotificationsDisallowed">
             If you'd like to receive desktop notifications when new messages arrive on this topic, you have

server/server.go

@@ -243,6 +243,9 @@ func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visito
 		return err
 	}
 	m := newDefaultMessage(t.id, string(b))
+	if m.Message == "" {
+		return errHTTPBadRequest
+	}
 	if err := t.Publish(m); err != nil {
 		return err
 	}

server/static/js/app.js

@@ -12,6 +12,10 @@
 let topics = {};
 let currentTopic = "";
 let currentTopicUnsubscribeOnClose = false;
+let currentUrl = window.location.hostname;
+if (window.location.port) {
+    currentUrl += ':' + window.location.port
+}
 
 /* Main view */
 const main = document.getElementById("main");
@@ -131,15 +135,15 @@ const fetchCachedMessages = async (topic) => {
 
 const showDetail = (topic) => {
     currentTopic = topic;
-    history.replaceState(topic, `ntfy.sh/${topic}`, `/${topic}`);
+    history.replaceState(topic, `${currentUrl}/${topic}`, `/${topic}`);
     window.scrollTo(0, 0);
     rerenderDetailView();
     return false;
 };
 
 const rerenderDetailView = () => {
-    detailTitle.innerHTML = `ntfy.sh/${currentTopic}`; // document.location.replaceAll(..)
-    detailTopicUrl.innerHTML = `ntfy.sh/${currentTopic}`;
+    detailTitle.innerHTML = `${currentUrl}/${currentTopic}`; // document.location.replaceAll(..)
+    detailTopicUrl.innerHTML = `${currentUrl}/${currentTopic}`;
     while (detailEventsList.firstChild) {
         detailEventsList.removeChild(detailEventsList.firstChild);
     }
@@ -347,3 +351,11 @@ document.querySelectorAll('.anchor').forEach((el) => {
         el.appendChild(anchor);
     }
 });
+
+// Change ntfy.sh url and protocol to match self-hosted one
+document.querySelectorAll('.ntfyUrl').forEach((el) => {
+    el.innerHTML = currentUrl;
+});
+document.querySelectorAll('.ntfyProtocol').forEach((el) => {
+    el.innerHTML = window.location.protocol + "//";
+});