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[Foundation] Ensure that post requests are not cached by the native code. #14729

Merged
merged 1 commit into from
Apr 13, 2022
Merged

[Foundation] Ensure that post requests are not cached by the native code. #14729

merged 1 commit into from
Apr 13, 2022

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mandel-macaque
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The behaviour from apple is wrong, PUT and POST are differnet in that PUT is idempotent.
Calling PUT several times successively has the same effect (that is no side effect),
where successive identical POST may have additional effects

We should not let the native code cache the calls.

Related issue: https://github.com/xamarin/maccore/issues/2571

@mandel-macaque
[Foundation] Ensure that post requests are not cached by the native
2f2df7d 
code.

The behaviour from apple is wrong, PUT and POST are differnet in that PUT is idempotent.
Calling PUT several times successively has the same effect (that is no side effect),
where successive identical POST may have additional effects

We should not let the native code cache the calls.
@mandel-macaque mandel-macaque added bug If an issue is a bug or a pull request a bug fix enhancement The issue or pull request is an enhancement labels Apr 12, 2022
dotMorten
dotMorten approved these changes Apr 12, 2022
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LGTM!

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📋 [PR Build] API Diff 📋

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Pipeline on Agent XAMBOT-1105.Monterey
Hash: 2f2df7de922e171b743400c890870032cc3434f0

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📚 [PR Build] Artifacts 📚

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Hash: 2f2df7de922e171b743400c890870032cc3434f0

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✅ Tests on macOS Mac Catalina (10.15) passed ✅

Tests passed

All tests on macOS Mac Catalina (10.15) passed.

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Merge 2f2df7d into b8eb1c3

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❌ Tests on macOS M1 - Mac Big Sur (11.5) failed ❌

Failed tests are:

  • dontlink
  • linksdk
  • xammac_tests
  • monotouch-test

Pipeline on Agent
Merge 2f2df7d into b8eb1c3

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Repro:
Just call await Repro.TestCache.Test();
This works the first time. Second time this is hit, the two requests returns the same result.

using System.Diagnostics;
using System.Net.Http;
using System.Threading.Tasks;

namespace Repro
{
    internal class TestCache
    {
        private static HttpClient client;

        static TestCache()
        {
            HttpMessageHandler handler;
#if __IOS__
            handler = new NSUrlSessionHandler() { DisableCaching = false };
#else
            handler = new SocketsHttpHandler();
#endif
            client = new HttpClient(handler);
        }
        private static string geometry1 = "{\"rings\":[[[-8850486.2064999994,5428352.2069000006],[-8850441.0822000001,5428366.1526999995],[-8850443.4531999994,5428388.4157999977],[-8850446.6684000008,5428403.5560000017],[-8850448.7510000002,5428413.3632000014],[-8850447.1765000001,5428435.5754000023],[-8850451.3267000001,5428457.4098000005],[-8850471.9795999993,5428466.6921999976],[-8850493.2138,5428464.5538000017],[-8850513.8959999997,5428473.9180999994],[-8850533.9824999999,5428464.9620999992],[-8850556.2668999992,5428456.7908999994],[-8850571.7236000001,5428467.7929000035],[-8850554.7202000003,5428478.4509000033],[-8850565.2697000001,5428495.011500001],[-8850589.3803000003,5428501.6005000025],[-8850603.8397000004,5428488.4174000025],[-8850624.8110000007,5428483.8522000015],[-8850643.7498000003,5428473.7487000003],[-8850659.5940000005,5428486.5803000033],[-8850676.9729999993,5428502.0617000014],[-8850699.3959999997,5428493.6379000023],[-8850720.8646000009,5428496.5364999995],[-8850726.5916000009,5428519.8149999976],[-8850724.0365999993,5428545.9536999986],[-8850726.1265999991,5428574.0372999981],[-8850743.6446000002,5428595.2471999973],[-8850763.5956999995,5428615.2250000015],[-8850789.5184000004,5428625.0280999988],[-8850807.6157000009,5428630.1313999966],[-8850813.9215999991,5428646.5200999975],[-8850816.6597000007,5428653.6344000027],[-8850814.3870000001,5428669.3691999987],[-8850812.9289999995,5428674.6359999999],[-8850812.6074000001,5428679.9166999981],[-8850814.5410999991,5428689.1828999966],[-8850818.0854000002,5428698.1257999986],[-8850821.8454,5428707.3933999985],[-8850824.5295000002,5428712.7818000019],[-8850828.2873,5428713.7497999966],[-8850833.4410999995,5428711.8095000014],[-8850840.1848000009,5428708.1445000023],[-8850843.3881999999,5428710.0282000005],[-8850858.4316000007,5428711.8037],[-8850865.8016999997,5428723.3030999973],[-8850865.9372000005,5428723.7414999977],[-8850872.8550000004,5428746.0267999992],[-8850864.7002000008,5428765.4268999994],[-8850843.7696000002,5428775.7533000037],[-8850819.0780999996,5428780.887000002],[-8850802.6544000003,5428790.0599000007],[-8850805.0438000001,5428794.0913000032],[-8850809.7755999994,5428802.0742999986],[-8850830.7207999993,5428798.3963999972],[-8850840.0125999991,5428809.8137999997],[-8850838.7166000009,5428831.7604999989],[-8850838.6600000001,5428832.7176999971],[-8850832.9110000003,5428857.0861999989],[-8850813.3221000005,5428876.7638000026],[-8850791.6170000006,5428885.7291999981],[-8850769.3851999994,5428879.5800999999],[-8850746.9181999993,5428871.0265000015],[-8850726.8850999996,5428870.5834999979],[-8850719.0888999999,5428885.1692000031],[-8850717.1414000001,5428909.5760999992],[-8850711.1984000001,5428932.3794],[-8850711.6011999995,5428954.6937000006],[-8850710.7043999992,5428977.3373999968],[-8850705.2451000009,5428998.009800002],[-8850695.8731999993,5429019.9773000032],[-8850700.6871000007,5429050.4305000007],[-8850700.5457000006,5429062.1116999984],[-8850700.3300999999,5429079.9838000014],[-8850719.4531999994,5429103.7062000036],[-8850728.1247000005,5429133.3127999976],[-8850744.7864999995,5429152.5314999968],[-8850764.2412999999,5429170.6999000013],[-8850784.7193,5429189.304899998],[-8850807.4370000008,5429208.1291999966],[-8850831.3439000007,5429222.3382999972],[-8850853.2862,5429238.817900002],[-8850866.0230999999,5429255.0750999972],[-8850887.2467,5429258.8241000026],[-8850901.6966999993,5429273.6393000036],[-8850907.1608000007,5429298.0992000028],[-8850912.2650000006,5429320.494599998],[-8850927.8913000003,5429343.2018999979],[-8850936.1900999993,5429369.3418999985],[-8850931.9892999995,5429391.2391000018],[-8850936.5823999997,5429415.3247999996],[-8850954.9451000001,5429428.2026000023],[-8851001.0543000009,5429412.557599999],[-8850993.7851999998,5429443.8603999987],[-8850994.7412999999,5429462.2897000015],[-8851011.6799999997,5429474.438000001],[-8851049.9931000005,5429474.3676000014],[-8851047.9627999999,5429492.5851999968],[-8851028.4952000007,5429493.1568000019],[-8851016.6469999999,5429503.3166999966],[-8851025.6232999992,5429528.5675999969],[-8851044.3045000006,5429540.7866000012],[-8851054.2167000007,5429528.6605999991],[-8851068.0430999994,5429527.7692999989],[-8851083.4617999997,5429544.8907999992],[-8851096.4341000002,5429567.7391000018],[-8851114.8535999991,5429586.3602000028],[-8851120.3855000008,5429607.7584000006],[-8851117.7765999995,5429630.5231000036],[-8851141.7802000009,5429637.7145999968],[-8851159.4525000006,5429653.0974999964],[-8851161.8616000004,5429677.9165999964],[-8851151.7022999991,5429702.4393000007],[-8851148.1381000001,5429725.5302999988],[-8851171.1741000004,5429732.4914999977],[-8851193.7673000004,5429735.7921999991],[-8851204.7611999996,5429748.7088999972],[-8851215.7147000004,5429769.7014999986],[-8851222.3408000004,5429791.4843000025],[-8851232.3363000005,5429782.9338999987],[-8851256.4233999997,5429788.7751000002],[-8851269.1886,5429811.6683000028],[-8851254.1241999995,5429857.5583000034],[-8851261.5806000009,5429882.1327000037],[-885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        private static string geometry2 = 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        // Run this twice. The second time R1 will == R2
        public static async Task<bool> Test()
        {
            var r1 = await Request(geometry1);
            Debug.WriteLine(r1); // Should be count = 5459
            var r2 = await Request(geometry2);
            Debug.WriteLine(r2); //should be count = 4652
            if (r1 == r2)
            {
                Debugger.Break(); // This shouldn't happen unless the wrong thing is cached
                return false;
            }
            else
                return true;
        }
        private static async Task<string> Request(string geometry)
        {
            var url = "https://services5.arcgis.com/N82JbI5EYtAkuUKU/arcgis/rest/services/FeatureSetByName_iOS/FeatureServer/0/query";
            var queryParameters = new System.Collections.Generic.Dictionary<string, string>();
            queryParameters["f"] = "json";
            queryParameters["geometry"] = geometry;
            queryParameters["geometryType"] = "esriGeometryPolygon";
            queryParameters["inSR"] = "3857";
            queryParameters["spatialRel"] = "esriSpatialRelIntersects";
            queryParameters["returnCountOnly"] = "true";
            var request = new HttpRequestMessage(HttpMethod.Post, url) { Content = new FormUrlEncodedContent(queryParameters) };
            var msg = await client.SendAsync(request);
            return await msg.Content.ReadAsStringAsync();

        }
    }
}
```

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✅ [CI Build] Tests passed on VSTS: simulator tests iOS. ✅

Tests passed on VSTS: simulator tests iOS.

🎉 All 108 tests passed 🎉

Pipeline on Agent XAMBOT-1109.Monterey'
Merge 2f2df7d into b8eb1c3

@mstefarov
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We tried the CI binaries with the reproducer and all our iOS unit tests, and everything looks good. The HTTP caching problem is no longer reproducible. Thank you!

@mandel-macaque mandel-macaque merged commit 1f1189f into main Apr 13, 2022
@mandel-macaque mandel-macaque deleted the donot-cache-post branch April 13, 2022 18:09
@mandel-macaque
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/sudo backport d17-2

@vs-mobiletools-engineering-service2
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Backport Job to branch d17-2 Created! The magic is happening here

Merged
@vs-mobiletools-engineering-service2
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Hooray! Backport succeeded! Please see https://devdiv.visualstudio.com/DevDiv/_build/results?buildId=6020619 for more details.

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@tj-devel709 tj-devel709 tj-devel709 approved these changes

@chamons chamons chamons approved these changes

@dotMorten dotMorten dotMorten approved these changes

@dalexsoto dalexsoto dalexsoto approved these changes

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@mandel-macaque @vs-mobiletools-engineering-service2 @dotMorten @mstefarov @dalexsoto @chamons @tj-devel709