Lib.rs

› GUI | Network programming
#flutter #mobile #ui #reactnative

applin

Backend library for the Applin™ Server-Driven UI framework

by Michael Leonhard

18 releases

0.3.0 Jul 6, 2025
0.2.9 Nov 3, 2024
0.2.8 Mar 22, 2024
0.2.7 Feb 28, 2024
0.1.2 Nov 10, 2023

#185 in GUI

Download history 2/week @ 2025-08-15 7/week @ 2025-08-22 3/week @ 2025-08-29 6/week @ 2025-09-05 2/week @ 2025-09-19 4/week @ 2025-09-26 3/week @ 2025-10-10 16/week @ 2025-10-17

1,108 downloads per month
Used in applin_headless

Custom license

150KB
4.5K SLoC

applin-rust

crates.io version unsafe forbidden pipeline status

You can use the Applin™ Server-Driven UI framework to build a mobile app with only server-side code.

https://www.applin.dev/

Use a provided boilerplate app for the frontend. Use this library for the backend.

Documentation: https://www.applin.dev/docs/

Example and live demo: https://github.com/leonhard-llc/applin-rust-demo

Related crate: applin_headless

Cargo Geiger Safety Report


Metric output format: x/y
    x = unsafe code used by the build
    y = total unsafe code found in the crate

Symbols:
    🔒  = No `unsafe` usage found, declares #![forbid(unsafe_code)]
    ❓  = No `unsafe` usage found, missing #![forbid(unsafe_code)]
    ☢️  = `unsafe` usage found

Functions  Expressions  Impls  Traits  Methods  Dependency

0/0        0/0          0/0    0/0     0/0      🔒  applin 0.3.0
0/0        0/0          0/0    0/0     0/0      🔒  ├── servlin 0.8.0
0/0        0/0          0/0    0/0     0/0      🔒  │   ├── async-fs 2.1.2
4/4        222/222      40/40  0/0     13/13    ☢️  │   │   ├── async-lock 3.4.0
0/0        2/2          0/0    0/0     0/0      ☢️  │   │   │   ├── event-listener-strategy 0.5.4
0/0        39/49        8/12   0/0     2/2      ☢️  │   │   │   │   ├── event-listener 5.4.0
0/0        183/183      2/2    0/0     1/1      ☢️  │   │   │   │   │   ├── concurrent-queue 2.5.0
4/4        12/75        4/16   0/0     0/3      ☢️  │   │   │   │   │   │   └── crossbeam-utils 0.8.21
0/0        0/0          0/0    0/0     0/0      🔒  │   │   │   │   │   ├── parking 2.2.1
0/0        11/191       0/0    0/0     2/2      ☢️  │   │   │   │   │   └── pin-project-lite 0.2.16
0/0        11/191       0/0    0/0     2/2      ☢️  │   │   │   │   └── pin-project-lite 0.2.16
0/0        39/49        8/12   0/0     2/2      ☢️  │   │   │   ├── event-listener 5.4.0
0/0        11/191       0/0    0/0     2/2      ☢️  │   │   │   └── pin-project-lite 0.2.16
0/0        0/0          0/0    0/0     0/0      🔒  │   │   ├── blocking 1.6.2
0/0        0/0          0/0    0/0     0/0      🔒  │   │   │   ├── async-channel 2.5.0
0/0        183/183      2/2    0/0     1/1      ☢️  │   │   │   │   ├── concurrent-queue 2.5.0
0/0        2/2          0/0    0/0     0/0      ☢️  │   │   │   │   ├── event-listener-strategy 0.5.4
0/0        36/36        2/2    0/0     0/0      ☢️  │   │   │   │   ├── futures-core 0.3.31
0/0        11/191       0/0    0/0     2/2      ☢️  │   │   │   │   └── pin-project-lite 0.2.16
1/1        860/866      4/4    0/0     13/13    ☢️  │   │   │   ├── async-task 4.7.1
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   ├── futures-io 0.3.31
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   ├── futures-lite 2.6.0
0/0        0/0          0/0    0/0     0/0      🔒  │   │   │   │   ├── fastrand 2.3.0
0/0        36/36        2/2    0/0     0/0      ☢️  │   │   │   │   ├── futures-core 0.3.31
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   │   ├── futures-io 0.3.31
34/41      1700/2421    2/2    0/0     82/147   ☢️  │   │   │   │   ├── memchr 2.7.5
0/0        0/0          0/0    0/0     0/0      🔒  │   │   │   │   ├── parking 2.2.1
0/0        11/191       0/0    0/0     2/2      ☢️  │   │   │   │   └── pin-project-lite 0.2.16
0/0        28/28        2/2    0/0     0/0      ☢️  │   │   │   ├── piper 0.2.4
0/0        32/32        2/2    0/0     0/0      ☢️  │   │   │   │   ├── atomic-waker 1.1.2
0/0        0/0          0/0    0/0     0/0      🔒  │   │   │   │   ├── fastrand 2.3.0
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   │   └── futures-io 0.3.31
0/0        14/14        1/1    0/0     0/0      ☢️  │   │   │   └── tracing 0.1.41
0/0        11/191       0/0    0/0     2/2      ☢️  │   │   │       ├── pin-project-lite 0.2.16
0/0        98/98        5/5    0/0     2/2      ☢️  │   │   │       └── tracing-core 0.1.34
0/0        0/0          0/0    0/0     0/0      ❓  │   │   └── futures-lite 2.6.0
0/0        0/0          0/0    0/0     0/0      🔒  │   ├── async-net 2.0.0
0/0        72/118       19/22  1/1     5/9      ☢️  │   │   ├── async-io 2.4.1
4/4        222/222      40/40  0/0     13/13    ☢️  │   │   │   ├── async-lock 3.4.0
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   ├── cfg-if 1.0.1
0/0        183/183      2/2    0/0     1/1      ☢️  │   │   │   ├── concurrent-queue 2.5.0
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   ├── futures-io 0.3.31
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   ├── futures-lite 2.6.0
0/0        0/0          0/0    0/0     0/0      🔒  │   │   │   ├── parking 2.2.1
0/2        39/425       5/20   1/4     5/14     ☢️  │   │   │   ├── polling 3.8.0
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   │   ├── cfg-if 1.0.1
61/433     2727/7465    18/22  2/2     41/62    ☢️  │   │   │   │   ├── rustix 1.0.7
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   │   │   ├── bitflags 2.9.1
0/0        5/5          0/0    0/0     0/0      ☢️  │   │   │   │   │   │   └── serde 1.0.219
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   │   │   │       └── serde_derive 1.0.219
0/0        14/14        0/0    0/0     3/3      ☢️  │   │   │   │   │   │           ├── proc-macro2 1.0.95
0/0        4/4          0/0    0/0     0/0      ☢️  │   │   │   │   │   │           │   └── unicode-ident 1.0.18
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   │   │   │           ├── quote 1.0.40
0/0        14/14        0/0    0/0     3/3      ☢️  │   │   │   │   │   │           │   └── proc-macro2 1.0.95
0/0        88/88        3/3    0/0     2/2      ☢️  │   │   │   │   │   │           └── syn 2.0.104
0/0        14/14        0/0    0/0     3/3      ☢️  │   │   │   │   │   │               ├── proc-macro2 1.0.95
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   │   │   │               ├── quote 1.0.40
0/0        4/4          0/0    0/0     0/0      ☢️  │   │   │   │   │   │               └── unicode-ident 1.0.18
0/0        35/103       0/0    0/0     0/0      ☢️  │   │   │   │   │   ├── errno 0.3.13
1/90       10/679       0/2    0/0     5/92     ☢️  │   │   │   │   │   │   └── libc 0.2.174
1/90       10/679       0/2    0/0     5/92     ☢️  │   │   │   │   │   └── libc 0.2.174
0/0        14/14        1/1    0/0     0/0      ☢️  │   │   │   │   └── tracing 0.1.41
61/433     2727/7465    18/22  2/2     41/62    ☢️  │   │   │   ├── rustix 1.0.7
0/0        29/29        0/0    0/0     3/3      ☢️  │   │   │   ├── slab 0.4.10
0/0        5/5          0/0    0/0     0/0      ☢️  │   │   │   │   └── serde 1.0.219
0/0        14/14        1/1    0/0     0/0      ☢️  │   │   │   └── tracing 0.1.41
0/0        0/0          0/0    0/0     0/0      🔒  │   │   ├── blocking 1.6.2
0/0        0/0          0/0    0/0     0/0      ❓  │   │   └── futures-lite 2.6.0
0/0        0/0          0/0    0/0     0/0      🔒  │   ├── fixed-buffer 1.0.2
0/0        0/0          0/0    0/0     0/0      ❓  │   │   └── futures-io 0.3.31
0/0        0/0          0/0    0/0     0/0      ❓  │   ├── futures-io 0.3.31
0/0        0/0          0/0    0/0     0/0      ❓  │   ├── futures-lite 2.6.0
0/0        0/0          0/0    0/0     0/0      🔒  │   ├── permit 0.2.1
0/0        12/32        0/0    0/0     0/0      ☢️  │   ├── rand 0.8.5
1/90       10/679       0/2    0/0     5/92     ☢️  │   │   ├── libc 0.2.174
0/0        2/2          0/0    0/0     0/0      ☢️  │   │   ├── rand_core 0.6.4
3/6        51/192       0/1    0/0     1/3      ☢️  │   │   │   ├── getrandom 0.2.16
0/0        0/0          0/0    0/0     0/0      ❓  │   │   │   │   ├── cfg-if 1.0.1
1/90       10/679       0/2    0/0     5/92     ☢️  │   │   │   │   └── libc 0.2.174
0/0        5/5          0/0    0/0     0/0      ☢️  │   │   │   └── serde 1.0.219
0/0        5/5          0/0    0/0     0/0      ☢️  │   │   └── serde 1.0.219
0/0        0/0          0/0    0/0     0/0      🔒  │   ├── safe-regex 0.3.0
0/0        0/0          0/0    0/0     0/0      🔒  │   │   └── safe-regex-macro 0.3.0
0/0        0/0          0/0    0/0     0/0      🔒  │   │       ├── safe-proc-macro2 1.0.95
0/0        0/0          0/0    0/0     0/0      🔒  │   │       │   └── unicode-xid 0.2.6
0/0        0/0          0/0    0/0     0/0      🔒  │   │       └── safe-regex-compiler 0.3.0
0/0        0/0          0/0    0/0     0/0      🔒  │   │           ├── safe-proc-macro2 1.0.95
0/0        0/0          0/0    0/0     0/0      🔒  │   │           └── safe-quote 1.0.40
0/0        0/0          0/0    0/0     0/0      🔒  │   │               └── safe-proc-macro2 1.0.95
0/0        0/0          0/0    0/0     0/0      🔒  │   ├── safina 0.7.0
0/0        5/5          0/0    0/0     0/0      ☢️  │   ├── serde 1.0.219
0/0        72/75        0/0    0/0     0/0      ☢️  │   ├── serde_json 1.0.140
0/0        8/8          0/0    0/0     0/0      ☢️  │   │   ├── itoa 1.0.15
34/41      1700/2421    2/2    0/0     82/147   ☢️  │   │   ├── memchr 2.7.5
7/9        572/702      0/0    0/0     2/2      ☢️  │   │   ├── ryu 1.0.20
0/0        5/5          0/0    0/0     0/0      ☢️  │   │   └── serde 1.0.219
0/0        0/0          0/0    0/0     0/0      🔒  │   ├── temp-dir 0.1.16
0/0        0/0          0/0    0/0     0/0      🔒  │   └── temp-file 0.1.9
0/0        7/20         0/0    0/0     0/0      ☢️  ├── nanorand 0.7.0
3/6        51/192       0/1    0/0     1/3      ☢️  │   └── getrandom 0.2.16
0/0        5/5          0/0    0/0     0/0      ☢️  ├── serde 1.0.219
0/0        72/75        0/0    0/0     0/0      ☢️  └── serde_json 1.0.140

115/590    6984/14178   117/158 4/7     182/373

Changelog

  • v0.3.0 2025-07-06 - Upgrade to servlin v0.8.
  • v0.2.9 2024-10-26
    • Add ModalButton::new and ModalButton::with_actions.
    • Upgrade to servlin v0.6.
  • v0.2.8 - Make debug formatting more concise by using JSON, for better test failure messages.
  • v0.2.7
    • Support ApplinIos 0.38.0.
    • Add checkbox_button.
  • v0.2.6 - Add RowList::push, RowList::new, OptWidgetList::push, and OptWidgetList::new.
  • v0.2.5 - Add WidgetList::push and WidgetList::new.
  • v0.2.4
    • Support ApplinIos 0.36.0.
    • Add reset_var and stop_actions actions.
  • v0.2.3 - Add id field to Action and ModalButton, for testing.
  • v0.2.2 - Add with_validated to input widgets. Supports ApplinIos 0.33.0.
  • v0.2.1
    • Add id fields for testing.
    • Make Action fields public.
    • Make Real32 and enums Copy.
  • v0.2.0
    • Support ApplinIos 0.32.0.
    • Remove on_user_error_poll action and make it a parameter of the rpc action.
  • v0.1.7
    • Support ApplinIos 0.31.0.
    • Add modal action.
    • Add aspect_ratio to choose_photo and take_photo actions.
  • v0.1.6
    • Support ApplinIos 0.28.0.
    • Add logout action.
    • Add selector widget.
  • v0.1.5
    • Support ApplinIos 0.25.0.
    • Add poll_delay_ms to checkbox and textfield.
    • Replace checkbox rpc field with actions.
  • v0.1.4
    • Add From<Option<Into<Widget>>> for Widget for use with error_text.
    • Add SessionCookie, Id, and Secret.
    • Organize into modules for easier discovery.
  • v0.1.3 - Add on_user_error_poll action.
  • v0.1.2 - Bugfixes
  • v0.1.1 - Update documentation.
  • v0.1.0 - First published version

Dependencies

~0.7–6MB
~133K SLoC