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Add notes to ext/wasm/README.md explaining how to run tests on a remote

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FossilOrigin-Name: 7a3c444fb515413254b426908e4d3528ccc664a629628c23b7b85bd21c060d0e
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drh 2022-08-18 15:53:27 +00:00
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commit 4ff42a82f7
3 changed files with 35 additions and 8 deletions
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ext/wasm/README.md
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@ -10,6 +10,7 @@ below for Linux environments:
```
# Clone the emscripten repository:
$ sudo apt install git
$ git clone https://github.com/emscripten-core/emsdk.git
$ cd emsdk
@ -74,6 +75,32 @@ from 2022-05-17 or newer so that it recognizes the `.wasm` file
extension and responds with the mimetype `application/wasm`, as the
WASM loader is pedantic about that detail.
# Testing on a remote machine that is accessed via SSH
*NB: The following are developer notes, last validated on 2022-08-18*
* Remote: Install git, emsdk, and althttpd
* Use a [version of althttpd](https://sqlite.org/althttpd/timeline?r=enable-atomics)
that adds HTTP reply header lines to enable SharedArrayBuffers. These header
lines are required:
```
Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp
```
* Remote: Install the SQLite source tree. CD to ext/wasm
* Remote: "`make`" to build WASM
* Remote: althttpd --port 8080 --popup
* Local: ssh -L 8180:localhost:8080 remote
* Local: Point your web-browser at http://localhost:8180/testing1.html
In order to enable [SharedArrayBuffers](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer),
the web-browser requires that the two extra Cross-Origin lines be present
in HTTP reply headers and that the request must come from "localhost".
Since the web-server is on a different machine from
the web-broser, the localhost requirement means that the connection must be tunneled
using SSH.
# Known Quirks and Limitations

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C javascript:\srename\sand\ssimplify\sDB.callInTransaction()\sas\sDB.transaction().\sAdd\sDB.savepoint(),\swhich\sworks\sthe\ssame\sas\stransaction()\sbut\suses\ssavepoints.\sCorrect\sconcatenation\sof\sarguments\sto\sSQLite3Error\sto\suse\sspaces\sinstead\sof\scommas.\sTest\sthat\sdemo-oo1.js\sworks\swith\spersistent\sOPFS\sstorage\s(output\sdiffers\sdue\sto\spersistent\srows,\sbut\sthe\sdemo\sworks).
D 2022-08-18T12:21:58.613
C Add\snotes\sto\sext/wasm/README.md\sexplaining\show\sto\srun\stests\son\sa\sremote\nmachine.
D 2022-08-18T15:53:27.160
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F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -475,7 +475,7 @@ F ext/userauth/userauth.c 7f00cded7dcaa5d47f54539b290a43d2e59f4b1eb5f447545fa865
F ext/wasm/EXPORTED_FUNCTIONS.fiddle db7a4602f043cf4a5e4135be3609a487f9f1c83f05778bfbdf93766be4541b96
F ext/wasm/EXPORTED_RUNTIME_METHODS.fiddle a004bd5eeeda6d3b28d16779b7f1a80305bfe009dfc7f0721b042967f0d39d02
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F ext/wasm/README.md 4b00ae7c7d93c4591251245f0996a319e2651361013c98d2efb0b026771b7331
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F ext/wasm/api/README.md d876597edd2b9542b6ea031adaaff1c042076fde7b670b1dc6d8a87b28a6631b
@ -2006,8 +2006,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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