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cfbbc1a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | "use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RouterResponseController = void 0;
const common_1 = require("@nestjs/common");
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const sse_stream_1 = require("./sse-stream");
class RouterResponseController {
constructor(applicationRef) {
this.applicationRef = applicationRef;
this.logger = new common_1.Logger(RouterResponseController.name);
}
async apply(result, response, httpStatusCode) {
return this.applicationRef.reply(response, result, httpStatusCode);
}
async redirect(resultOrDeferred, response, redirectResponse) {
const result = await this.transformToResult(resultOrDeferred);
const statusCode = result && result.statusCode
? result.statusCode
: redirectResponse.statusCode
? redirectResponse.statusCode
: common_1.HttpStatus.FOUND;
const url = result && result.url ? result.url : redirectResponse.url;
this.applicationRef.redirect(response, statusCode, url);
}
async render(resultOrDeferred, response, template) {
const result = await this.transformToResult(resultOrDeferred);
return this.applicationRef.render(response, template, result);
}
async transformToResult(resultOrDeferred) {
if ((0, rxjs_1.isObservable)(resultOrDeferred)) {
return (0, rxjs_1.lastValueFrom)(resultOrDeferred);
}
return resultOrDeferred;
}
getStatusByMethod(requestMethod) {
switch (requestMethod) {
case common_1.RequestMethod.POST:
return common_1.HttpStatus.CREATED;
default:
return common_1.HttpStatus.OK;
}
}
setHeaders(response, headers) {
headers.forEach(({ name, value }) => this.applicationRef.setHeader(response, name, typeof value === 'function' ? value() : value));
}
setStatus(response, statusCode) {
this.applicationRef.status(response, statusCode);
}
async sse(result, response, request, options) {
// It's possible that we sent headers already so don't use a stream
if (response.writableEnded) {
return;
}
const stream = new sse_stream_1.SseStream(request);
const statusCode = options?.statusCode ??
response.statusCode ??
200;
return new Promise((resolve, reject) => {
let settled = false;
let closeRequested = false;
let subscription;
const disconnectSource = request.socket ?? response;
const cleanup = () => disconnectSource.removeListener('close', onClose);
const endStream = () => {
if (!stream.writableEnded) {
stream.end();
}
};
const onClose = () => {
if (settled || closeRequested) {
return;
}
closeRequested = true;
if (!subscription) {
cleanup();
return;
}
settled = true;
cleanup();
subscription?.unsubscribe();
endStream();
response.end();
resolve();
};
disconnectSource.once('close', onClose);
Promise.resolve(result)
.then(observableResult => {
if (settled) {
return;
}
this.assertObservable(observableResult);
if (closeRequested) {
const cleanupSubscription = observableResult.subscribe({
error: () => undefined,
});
cleanupSubscription.unsubscribe();
settled = true;
endStream();
response.end();
resolve();
return;
}
stream.pipe(response, {
additionalHeaders: options?.additionalHeaders,
statusCode,
});
subscription = observableResult
.pipe((0, operators_1.map)((message) => {
if ((0, shared_utils_1.isObject)(message)) {
return message;
}
return { data: message };
}), (0, operators_1.concatMap)(message => new Promise(resolve => stream.writeMessage(message, () => resolve()))), (0, operators_1.catchError)(err => {
if (!stream.headersCommitted) {
throw err;
}
const data = err instanceof Error ? err.message : err;
stream.writeMessage({ type: 'error', data }, writeError => {
if (writeError) {
this.logger.error(writeError);
}
});
return rxjs_1.EMPTY;
}))
.subscribe({
error: err => {
if (settled) {
return;
}
settled = true;
cleanup();
endStream();
reject(err);
},
complete: () => {
if (settled) {
return;
}
settled = true;
cleanup();
endStream();
resolve();
},
});
// Commit SSE headers on the next macrotask. Pipe validation errors
// propagate through microtasks (which complete before macrotasks),
// so if the lifecycle errored, `settled` is already true and we
// skip the write. Otherwise headers are sent immediately rather
// than waiting for the first Observable emission.
setTimeout(() => {
if (!settled) {
stream.commitHeaders();
}
}, 0);
})
.catch(err => {
if (settled) {
return;
}
if (closeRequested) {
settled = true;
endStream();
response.end();
resolve();
return;
}
settled = true;
cleanup();
endStream();
reject(err);
});
});
}
assertObservable(value) {
if (!(0, rxjs_1.isObservable)(value)) {
throw new ReferenceError('You must return an Observable stream to use Server-Sent Events (SSE).');
}
}
}
exports.RouterResponseController = RouterResponseController;
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