Separate Tornado handlers into their own class

[davidbrochart]

References

This will make it easier to support Jupyverse (see #984).

Code changes

This PR moves the Tornado-specific parts (the GET handlers) into their own class.

User-facing changes

None.

Backwards-incompatible changes

None.

[github-actions[bot]]

:point_left: Launch a Binder on branch davidbrochart/voila/get

[davidbrochart]

CI failures are unrelated, see #1331.

[trungleduc]

Hey @davidbrochart, could you rebase your PR, the CI is fixed.

[github-actions[bot]]

Benchmark report

The execution time (in milliseconds) are grouped by test file, test type and browser. For each case, the following values are computed: min <- [1st quartile - median - 3rd quartile] -> max.

Results table

| Test file | voila-tree-classic.ipynb | voila-tree-light.ipynb | voila-tree-dark.ipynb | voila-tree-miami.ipynb | basics.ipynb | bqplot.ipynb | dashboard.ipynb | gridspecLayout.ipynb | interactive.ipynb | ipympl.ipynb | mimerenderers.ipynb | bokeh.ipynb | multiple_widgets.ipynb | query-strings.ipynb | reveal.ipynb | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | **Render** | | | | | | | | | | | | | | | | | `chromium` | | | | | | | | | | | | | | | | | actual | 84 <- [91 - 101 - 130] -> 204 | 70 <- [74 - 79 - 91] -> 129 | 71 <- [73 - 82 - 92] -> 119 | 65 <- [68 - 74 - 89] -> 113 | 2647 <- [2751 - 2823 - 2910] -> 4038 | 2255 <- [2324 - 2332 - 2459] -> 2653 | 2419 <- [2451 - 2455 - 2599] -> 2685 | 2498 <- [2516 - 2518 - 2564] -> 2629 | 1945 <- [1962 - 1995 - 2123] -> 2353 | 3052 <- [3131 - 3156 - 3206] -> 3651 | 7424 <- [7639 - 7645 - 7654] -> 7697 | 3544 <- [3580 - 3601 - 3617] -> 3857 | 3856 <- [3889 - 3914 - 3990] -> 4209 | 1580 <- [1593 - 1600 - 1621] -> 1676 | 2908 <- [2908 - 2945 - 2983] -> 3250 | | expected | 3379 <- [3442 - 3517 - 3701] -> 3876 | 2976 <- [3227 - 3321 - 3421] -> 3604 | 3608 <- [3623 - 3709 - 3793] -> 3825 | 4453 <- [4453 - 4523 - 4661] -> 4748 | 2559 <- [2655 - 2656 - 2660] -> 2674 | 3982 <- [4079 - 4213 - 4356] -> 4743 | 12183 <- [18509 - 19553 - 20811] -> 21515 | 15319 <- [15660 - 15796 - 15912] -> 16056 | 1517 <- [1920 - 1997 - 2103] -> 2113 |

:exclamation: Test metadata have changed

```diff --- /dev/fd/63 2023-06-23 16:22:19.186233515 +0000 +++ /dev/fd/62 2023-06-23 16:22:19.186233515 +0000 @@ -4,51 +4,49 @@ "BENCHMARK_REFERENCE": "actual" }, "browsers": { - "chromium": "112.0.5615.29" + "chromium": "94.0.4595.0" }, "systemInformation": { "cpu": { - "brand": "Xeon® Platinum 8370C", + "brand": "Xeon® E5-2673 v3", "cache": { - "l1d": 98304, + "l1d": 65536, "l1i": 65536, - "l2": 2097152, - "l3": 50331648 + "l2": 524288, + "l3": 31457280 }, "cores": 2, - "efficiencyCores": 0, "family": "6", - "flags": "fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single pti fsgsbase bmi1 hle avx2 smep bmi2 erms invpcid rtm avx512f avx512dq rdseed adx smap clflushopt avx512cd avx512bw avx512vl xsaveopt xsavec xsaves md_clear", + "flags": "fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm invpcid_single pti fsgsbase bmi1 avx2 smep bmi2 erms invpcid xsaveopt md_clear", "governor": "", - "manufacturer": "Intel", - "model": "106", - "performanceCores": 2, + "manufacturer": "Intel®", + "model": "63", "physicalCores": 2, "processors": 1, "revision": "", "socket": "", - "speed": 2.8, + "speed": 2.4, "speedMax": null, "speedMin": null, - "stepping": "6", - "vendor": "Intel", + "stepping": "2", + "vendor": "GenuineIntel", "virtualization": false, "voltage": "" }, "mem": { - "total": 7268679680 + "total": 7291699200 }, "osInfo": { "arch": "x64", "build": "", - "codename": "Jammy Jellyfish", + "codename": "Focal Fossa", "codepage": "UTF-8", "distro": "Ubuntu", - "kernel": "5.15.0-1040-azure", + "kernel": "5.8.0-1040-azure", "logofile": "ubuntu", "platform": "linux", - "release": "22.04.2 LTS", - "serial": "b53da094229547778a51a873666147e4", + "release": "20.04.3 LTS", + "serial": "cfc067bfcb844f35865e279a1b0e66c5", "servicepack": "", "uefi": false } ```

[trungleduc]

Thanks @davidbrochart !