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comparison xml/en/docs/njs/examples.xml @ 2799:24b379907b0f

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Added async and await to njs Examples.
author Yaroslav Zhuravlev <yar@nginx.com>
date Fri, 19 Nov 2021 08:19:57 +0000
parents bf641527bd3d
children 9eadb98ec770
comparison
equal deleted inserted replaced
2798:cf75284a3557 2799:24b379907b0f
7 <!DOCTYPE article SYSTEM "../../../../dtd/article.dtd"> 7 <!DOCTYPE article SYSTEM "../../../../dtd/article.dtd">
8 8
9 <article name="Examples" 9 <article name="Examples"
10 link="/en/docs/njs/examples.html" 10 link="/en/docs/njs/examples.html"
11 lang="en" 11 lang="en"
12 rev="20"> 12 rev="21">
13 13
14 <section id="summary"> 14 <section id="summary">
15 15
16 <para> 16 <para>
17 The examples work since 17 The examples work since
223 </para> 223 </para>
224 224
225 <para> 225 <para>
226 <path>http.js</path>: 226 <path>http.js</path>:
227 <example> 227 <example>
228 function set_keyval(r) { 228 async function set_keyval(r) {
229 r.subrequest('/api/7/http/keyvals/foo', 229 let res = await r.subrequest('/api/7/http/keyvals/foo',
230 { method: 'POST', 230 { method: 'POST',
231 body: JSON.stringify({ foo: 789, bar: "ss dd 00" })}, 231 body: JSON.stringify({ foo: 789, bar: "ss dd 00" })});
232 232
233 function(res) { 233 if (res.status >= 300) {
234 if (res.status >= 300) { 234 r.return(res.status, res.responseBody);
235 r.return(res.status, res.responseBody); 235 return;
236 return; 236 }
237 } 237
238 r.return(500); 238 r.return(200);
239 }); 239 }
240 } 240
241 241 async function version(r) {
242 function version(r) { 242 let res = await r.subrequest('/api/7/nginx', { method: 'GET' });
243 r.subrequest('/api/7/nginx', { method: 'GET' }, function(res) { 243
244 if (res.status != 200) { 244 if (res.status != 200) {
245 r.return(res.status); 245 r.return(res.status);
246 return; 246 return;
247 } 247 }
248 248
249 var json = JSON.parse(res.responseBody); 249 var json = JSON.parse(res.responseBody);
250 r.return(200, json.version); 250 r.return(200, json.version);
251 });
252 } 251 }
253 252
254 export default {set_keyval, version}; 253 export default {set_keyval, version};
255 </example> 254 </example>
256 <note> 255 <note>
331 </para> 330 </para>
332 331
333 <para> 332 <para>
334 <path>http.js</path>: 333 <path>http.js</path>:
335 <example> 334 <example>
336 function content(r) { 335 async function content(r) {
337 r.subrequest('/auth') 336 try {
338 .then(reply => JSON.parse(reply.responseBody)) 337 let reply = await r.subrequest('/auth');
339 .then(response => { 338 let response = JSON.parse(reply.responseBody);
340 if (!response['token']) { 339 let token = response['token'];
341 throw new Error("token is not available"); 340
342 } 341 if (!token) {
343 return reply['token']; 342 throw new Error("token is not available");
344 }) 343 }
345 .then(token => { 344
346 r.subrequest('/backend', `token=${token}`) 345 let backend_reply = await r.subrequest('/backend', `token=${token}`);
347 .then(reply => r.return(reply.status, reply.responseBody)); 346 r.return(backend_reply.status, backend_reply.responseBody);
348 }) 347
349 .catch(_ => r.return(500)); 348 } catch (e) {
349 r.error(e);
350 r.return(500);
351 }
350 } 352 }
351 353
352 export default {content}; 354 export default {content};
353 </example> 355 </example>
354 </para> 356 </para>