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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.Linq; |
| 4 | +using System.Runtime.Serialization; |
| 5 | +using System.Text; |
| 6 | + |
| 7 | +namespace StackExchange.Profiling |
| 8 | +{ |
| 9 | + /// <summary> |
| 10 | + /// Times collected from the client |
| 11 | + /// </summary> |
| 12 | + [DataContract] |
| 13 | + public class ClientTimings |
| 14 | + { |
| 15 | + private const string TimingPrefix = "clientPerformance[timing]["; |
| 16 | + private const string ProbesPrefix = "clientProbes["; |
| 17 | + |
| 18 | + /// <summary> |
| 19 | + /// Gets or sets the list of client side timings |
| 20 | + /// </summary> |
| 21 | + [DataMember(Order = 2)] |
| 22 | + public List<ClientTiming> Timings { get; set; } |
| 23 | + |
| 24 | + /// <summary> |
| 25 | + /// Gets or sets the redirect count. |
| 26 | + /// </summary> |
| 27 | + [DataMember(Order = 1)] |
| 28 | + public int RedirectCount { get; set; } |
| 29 | + |
| 30 | + /// <summary> |
| 31 | + /// Returns null if there is not client timing stuff |
| 32 | + /// </summary> |
| 33 | + /// <param name="form">The form to transform to a <see cref="ClientTiming"/>.</param> |
| 34 | + public static ClientTimings FromForm(IDictionary<string, string> form) |
| 35 | + { |
| 36 | + ClientTimings timing = null; |
| 37 | + // AJAX requests won't have client timings |
| 38 | + if (!form.ContainsKey(TimingPrefix + "navigationStart]")) return timing; |
| 39 | + long.TryParse(form[TimingPrefix + "navigationStart]"], out long navigationStart); |
| 40 | + if (navigationStart > 0) |
| 41 | + { |
| 42 | + var timings = new List<ClientTiming>(); |
| 43 | + timing = new ClientTimings(); |
| 44 | + int.TryParse(form["clientPerformance[navigation][redirectCount]"], out int redirectCount); |
| 45 | + timing.RedirectCount = redirectCount; |
| 46 | + |
| 47 | + var clientPerf = new Dictionary<string, ClientTiming>(); |
| 48 | + var clientProbes = new Dictionary<int, ClientTiming>(); |
| 49 | + |
| 50 | + foreach (string key in |
| 51 | + form.Keys.OrderBy(i => i.IndexOf("Start]", StringComparison.Ordinal) > 0 ? "_" + i : i)) |
| 52 | + { |
| 53 | + if (key.StartsWith(TimingPrefix, StringComparison.Ordinal)) |
| 54 | + { |
| 55 | + long.TryParse(form[key], out long val); |
| 56 | + val -= navigationStart; |
| 57 | + |
| 58 | + string parsedName = key.Substring( |
| 59 | + TimingPrefix.Length, (key.Length - 1) - TimingPrefix.Length); |
| 60 | + |
| 61 | + // just ignore stuff that is negative ... not relevant |
| 62 | + if (val > 0) |
| 63 | + { |
| 64 | + if (parsedName.EndsWith("Start", StringComparison.Ordinal)) |
| 65 | + { |
| 66 | + var shortName = parsedName.Substring(0, parsedName.Length - 5); |
| 67 | + clientPerf[shortName] = new ClientTiming |
| 68 | + { |
| 69 | + Duration = -1, |
| 70 | + Name = parsedName, |
| 71 | + Start = val |
| 72 | + }; |
| 73 | + } |
| 74 | + else if (parsedName.EndsWith("End", StringComparison.Ordinal)) |
| 75 | + { |
| 76 | + var shortName = parsedName.Substring(0, parsedName.Length - 3); |
| 77 | + if (clientPerf.TryGetValue(shortName, out var t)) |
| 78 | + { |
| 79 | + t.Duration = val - t.Start; |
| 80 | + t.Name = shortName; |
| 81 | + } |
| 82 | + } |
| 83 | + else |
| 84 | + { |
| 85 | + clientPerf[parsedName] = new ClientTiming { Name = parsedName, Start = val, Duration = -1 }; |
| 86 | + } |
| 87 | + } |
| 88 | + } |
| 89 | + |
| 90 | + if (key.StartsWith(ProbesPrefix, StringComparison.Ordinal)) |
| 91 | + { |
| 92 | + int endBracketIndex = key.IndexOf(']'); |
| 93 | + if (endBracketIndex > 0 && int.TryParse(key.Substring(ProbesPrefix.Length, endBracketIndex - ProbesPrefix.Length), out int probeId)) |
| 94 | + { |
| 95 | + if (!clientProbes.TryGetValue(probeId, out var t)) |
| 96 | + { |
| 97 | + t = new ClientTiming(); |
| 98 | + clientProbes.Add(probeId, t); |
| 99 | + } |
| 100 | + |
| 101 | + if (key.EndsWith("[n]", StringComparison.Ordinal)) |
| 102 | + { |
| 103 | + t.Name = form[key]; |
| 104 | + } |
| 105 | + |
| 106 | + if (key.EndsWith("[d]", StringComparison.Ordinal)) |
| 107 | + { |
| 108 | + long.TryParse(form[key], out long val); |
| 109 | + if (val > 0) |
| 110 | + { |
| 111 | + t.Start = val - navigationStart; |
| 112 | + } |
| 113 | + } |
| 114 | + } |
| 115 | + } |
| 116 | + } |
| 117 | + |
| 118 | + foreach (var group in clientProbes |
| 119 | + .Values.OrderBy(p => p.Name) |
| 120 | + .GroupBy(p => p.Name)) |
| 121 | + { |
| 122 | + ClientTiming current = null; |
| 123 | + foreach (var item in group) |
| 124 | + { |
| 125 | + if (current == null) |
| 126 | + { |
| 127 | + current = item; |
| 128 | + } |
| 129 | + else |
| 130 | + { |
| 131 | + current.Duration = item.Start - current.Start; |
| 132 | + timings.Add(current); |
| 133 | + current = null; |
| 134 | + } |
| 135 | + } |
| 136 | + } |
| 137 | + |
| 138 | + foreach (var item in clientPerf.Values) |
| 139 | + { |
| 140 | + item.Name = SentenceCase(item.Name); |
| 141 | + } |
| 142 | + |
| 143 | + timings.AddRange(clientPerf.Values); |
| 144 | + timing.Timings = timings.OrderBy(t => t.Start).ToList(); |
| 145 | + } |
| 146 | + |
| 147 | + return timing; |
| 148 | + } |
| 149 | + |
| 150 | + private static string SentenceCase(string value) |
| 151 | + { |
| 152 | + var sb = new StringBuilder(); |
| 153 | + for (int i = 0; i < value.Length; i++) |
| 154 | + { |
| 155 | + if (i == 0) |
| 156 | + { |
| 157 | + sb.Append(char.ToUpper(value[0])); |
| 158 | + continue; |
| 159 | + } |
| 160 | + |
| 161 | + if (value[i] == char.ToUpper(value[i])) |
| 162 | + { |
| 163 | + sb.Append(' '); |
| 164 | + } |
| 165 | + |
| 166 | + sb.Append(value[i]); |
| 167 | + } |
| 168 | + |
| 169 | + return sb.ToString(); |
| 170 | + } |
| 171 | + } |
| 172 | +} |
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