@@ -54,6 +54,9 @@ export interface ProxyContextValue {
54 54
// then the latency has not been fetched yet. Calculations happen async for each proxy in the list.
55 55
// Refer to the returned report for a given proxy for more information.
56 56
proxyLatencies: ProxyLatencies;
57 +
// latenciesLoaded is true when the latencies have been initially loaded.
58 +
// Once set to true, it will not be set to false again.
59 +
latenciesLoaded: boolean;
57 60
// refetchProxyLatencies will trigger refreshing of the proxy latencies. By default the latencies
58 61
// are loaded once.
59 62
refetchProxyLatencies: () => Date;
@@ -122,8 +125,11 @@ export const ProxyProvider: FC<PropsWithChildren> = ({ children }) => {
122 125 123 126
// Every time we get a new proxiesResponse, update the latency check
124 127
// to each workspace proxy.
125 -
const { proxyLatencies, refetch: refetchProxyLatencies } =
126 -
useProxyLatency(proxiesResp);
128 +
const {
129 +
proxyLatencies,
130 +
refetch: refetchProxyLatencies,
131 +
loaded: latenciesLoaded,
132 +
} = useProxyLatency(proxiesResp);
127 133 128 134
// updateProxy is a helper function that when called will
129 135
// update the proxy being used.
@@ -136,7 +142,8 @@ export const ProxyProvider: FC<PropsWithChildren> = ({ children }) => {
136 142
loadUserSelectedProxy(),
137 143
proxyLatencies,
138 144
// Do not auto select based on latencies, as inconsistent latencies can cause this
139 -
// to behave poorly.
145 +
// to change on each call. updateProxy should be stable when selecting a proxy to
146 +
// prevent flickering.
140 147
false,
141 148
),
142 149
);
@@ -149,6 +156,34 @@ export const ProxyProvider: FC<PropsWithChildren> = ({ children }) => {
149 156
updateProxy();
150 157
}, [proxiesResp, proxyLatencies]);
151 158 159 +
// This useEffect will auto select the best proxy if the user has not selected one.
160 +
// It must wait until all latencies are loaded to select based on latency. This does mean
161 +
// the first time a user loads the page, the proxy will "flicker" to the best proxy.
162 +
//
163 +
// Once the page is loaded, or the user selects a proxy, this will not run again.
164 +
// biome-ignore lint/correctness/useExhaustiveDependencies: Only update if the source data changes
165 +
useEffect(() => {
166 +
if (loadUserSelectedProxy() !== undefined) {
167 +
return; // User has selected a proxy, do not auto select.
168 +
}
169 +
if (!latenciesLoaded) {
170 +
// Wait until the latencies are loaded first.
171 +
return;
172 +
}
173 + 174 +
const best = getPreferredProxy(
175 +
proxiesResp ?? [],
176 +
loadUserSelectedProxy(),
177 +
proxyLatencies,
178 +
true,
179 +
);
180 + 181 +
if (best?.proxy) {
182 +
saveUserSelectedProxy(best.proxy);
183 +
updateProxy();
184 +
}
185 +
}, [latenciesLoaded, proxiesResp, proxyLatencies]);
186 + 152 187
return (
153 188
<ProxyContext.Provider
154 189
value={{
@@ -157,6 +192,7 @@ export const ProxyProvider: FC<PropsWithChildren> = ({ children }) => {
157 192
userProxy: userSavedProxy,
158 193
proxy: proxy,
159 194
proxies: proxiesResp,
195 +
latenciesLoaded: latenciesLoaded,
160 196
isLoading: proxiesLoading,
161 197
isFetched: proxiesFetched,
162 198
error: proxiesError,
@@ -214,12 +250,12 @@ export const getPreferredProxy = (
214 250 215 251
// If no proxy is selected, or the selected proxy is unhealthy default to the primary proxy.
216 252
if (!selectedProxy || !selectedProxy.healthy) {
217 -
// By default, use the primary proxy.
253 +
// Default to the primary proxy
218 254
selectedProxy = proxies.find((proxy) => proxy.name === "primary");
219 255 220 256
// If we have latencies, then attempt to use the best proxy by latency instead.
221 257
const best = selectByLatency(proxies, latencies);
222 -
if (autoSelectBasedOnLatency && best) {
258 +
if (autoSelectBasedOnLatency && best !== undefined) {
223 259
selectedProxy = best;
224 260
}
225 261
}
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