How to create a .json file from fetch API call response using fs.writeFile
I want to generate a .json file on my local project folder. I want to save the fetch API call response (which is an array of objects) into a .json file on my hard disc. Here is my code :
const fs = require('fs');
export default function getdirectory(token) {
return fetch(url, {
headers: {Authorization: "Bearer " + token}
})
.then((response) => response.json())
.catch((err) =>{
console.log("ERORRRRRRRR @@@@@@" + err);
})
.then((response) => {
//console.log(response);
var jsoncontent = JSON.stringify(response);
//console.log(jsoncontent);
fs.writeFileSync('files-to-cache.json', jsoncontent, function(err) {
if (err)
{console.log("EROROROROROR ****" + err);}
else
{ return response;}
});
// return response;
})
.catch((err) =>{
console.log("ERORRRRRRRR $$$$$$" + err);
})
};
When I run the code in vs code I get the following error:
undefined is not a function (near '...fs.writeFileSync...')
It seems that it happens because the data is not ready at the time of json file creation (asynchronous). Some web sites recommend setTimeOut function or sf.writeFileSync instead of sf.writeFile. I tried both, but still it doesn't work.
Would you please help me to resolve this problem?
Many thanks
javascript
asked Nov 15 '18 at 7:37
Glory GloryGlory Glory
1
add a comment |
I want to generate a .json file on my local project folder. I want to save the fetch API call response (which is an array of objects) into a .json file on my hard disc. Here is my code :
const fs = require('fs');
export default function getdirectory(token) {
return fetch(url, {
headers: {Authorization: "Bearer " + token}
})
.then((response) => response.json())
.catch((err) =>{
console.log("ERORRRRRRRR @@@@@@" + err);
})
.then((response) => {
//console.log(response);
var jsoncontent = JSON.stringify(response);
//console.log(jsoncontent);
fs.writeFileSync('files-to-cache.json', jsoncontent, function(err) {
if (err)
{console.log("EROROROROROR ****" + err);}
else
{ return response;}
});
// return response;
})
.catch((err) =>{
console.log("ERORRRRRRRR $$$$$$" + err);
})
};
When I run the code in vs code I get the following error:
undefined is not a function (near '...fs.writeFileSync...')
It seems that it happens because the data is not ready at the time of json file creation (asynchronous). Some web sites recommend setTimeOut function or sf.writeFileSync instead of sf.writeFile. I tried both, but still it doesn't work.
Would you please help me to resolve this problem?
Many thanks
javascript
asked Nov 15 '18 at 7:37
Glory GloryGlory Glory
1
add a comment |
I want to generate a .json file on my local project folder. I want to save the fetch API call response (which is an array of objects) into a .json file on my hard disc. Here is my code :
const fs = require('fs');
export default function getdirectory(token) {
return fetch(url, {
headers: {Authorization: "Bearer " + token}
})
.then((response) => response.json())
.catch((err) =>{
console.log("ERORRRRRRRR @@@@@@" + err);
})
.then((response) => {
//console.log(response);
var jsoncontent = JSON.stringify(response);
//console.log(jsoncontent);
fs.writeFileSync('files-to-cache.json', jsoncontent, function(err) {
if (err)
{console.log("EROROROROROR ****" + err);}
else
{ return response;}
});
// return response;
})
.catch((err) =>{
console.log("ERORRRRRRRR $$$$$$" + err);
})
};
When I run the code in vs code I get the following error:
undefined is not a function (near '...fs.writeFileSync...')
It seems that it happens because the data is not ready at the time of json file creation (asynchronous). Some web sites recommend setTimeOut function or sf.writeFileSync instead of sf.writeFile. I tried both, but still it doesn't work.
Would you please help me to resolve this problem?
Many thanks
javascript
asked Nov 15 '18 at 7:37
Glory GloryGlory Glory
1
I want to generate a .json file on my local project folder. I want to save the fetch API call response (which is an array of objects) into a .json file on my hard disc. Here is my code :
const fs = require('fs');
export default function getdirectory(token) {
return fetch(url, {
headers: {Authorization: "Bearer " + token}
})
.then((response) => response.json())
.catch((err) =>{
console.log("ERORRRRRRRR @@@@@@" + err);
})
.then((response) => {
//console.log(response);
var jsoncontent = JSON.stringify(response);
//console.log(jsoncontent);
fs.writeFileSync('files-to-cache.json', jsoncontent, function(err) {
if (err)
{console.log("EROROROROROR ****" + err);}
else
{ return response;}
});
// return response;
})
.catch((err) =>{
console.log("ERORRRRRRRR $$$$$$" + err);
})
};
When I run the code in vs code I get the following error:
undefined is not a function (near '...fs.writeFileSync...')
It seems that it happens because the data is not ready at the time of json file creation (asynchronous). Some web sites recommend setTimeOut function or sf.writeFileSync instead of sf.writeFile. I tried both, but still it doesn't work.
Would you please help me to resolve this problem?
Many thanks
javascript
javascript
asked Nov 15 '18 at 7:37
Glory GloryGlory Glory
1
asked Nov 15 '18 at 7:37
Glory GloryGlory Glory
1
asked Nov 15 '18 at 7:37
Glory GloryGlory Glory
1
asked Nov 15 '18 at 7:37
Glory GloryGlory Glory
1
asked Nov 15 '18 at 7:37
Glory GloryGlory Glory
1
1
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You are using the incorrect version of write file, there are two different types, see below:
The first is writeFileSync, this is synchronous, and will block the thread, meaning your script cannot continue until it is finished, but most importantly it doesn't accept a call back...
Try this instead:
fs.writeFile('data.json', jsonData, 'utf8', (err) => {
if (err) throw err
console.log('File created!`)
})
Hope this helps.
answered Nov 15 '18 at 8:15
LloydLloyd
916
Thank you very much Lloyd for your guidance. I tried the code you provided, but unfortunately I still receive the same error : undefined is not a function (near '...fs.writeFile...')
– Glory Glory
Nov 15 '18 at 12:37
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You are using the incorrect version of write file, there are two different types, see below:
The first is writeFileSync, this is synchronous, and will block the thread, meaning your script cannot continue until it is finished, but most importantly it doesn't accept a call back...
Try this instead:
fs.writeFile('data.json', jsonData, 'utf8', (err) => {
if (err) throw err
console.log('File created!`)
})
Hope this helps.
answered Nov 15 '18 at 8:15
LloydLloyd
916
Thank you very much Lloyd for your guidance. I tried the code you provided, but unfortunately I still receive the same error : undefined is not a function (near '...fs.writeFile...')
– Glory Glory
Nov 15 '18 at 12:37
add a comment |
You are using the incorrect version of write file, there are two different types, see below:
The first is writeFileSync, this is synchronous, and will block the thread, meaning your script cannot continue until it is finished, but most importantly it doesn't accept a call back...
Try this instead:
fs.writeFile('data.json', jsonData, 'utf8', (err) => {
if (err) throw err
console.log('File created!`)
})
Hope this helps.
answered Nov 15 '18 at 8:15
LloydLloyd
916
Thank you very much Lloyd for your guidance. I tried the code you provided, but unfortunately I still receive the same error : undefined is not a function (near '...fs.writeFile...')
– Glory Glory
Nov 15 '18 at 12:37
add a comment |
You are using the incorrect version of write file, there are two different types, see below:
The first is writeFileSync, this is synchronous, and will block the thread, meaning your script cannot continue until it is finished, but most importantly it doesn't accept a call back...
Try this instead:
fs.writeFile('data.json', jsonData, 'utf8', (err) => {
if (err) throw err
console.log('File created!`)
})
Hope this helps.
answered Nov 15 '18 at 8:15
LloydLloyd
916
You are using the incorrect version of write file, there are two different types, see below:
The first is writeFileSync, this is synchronous, and will block the thread, meaning your script cannot continue until it is finished, but most importantly it doesn't accept a call back...
Try this instead:
fs.writeFile('data.json', jsonData, 'utf8', (err) => {
if (err) throw err
console.log('File created!`)
})
Hope this helps.
answered Nov 15 '18 at 8:15
LloydLloyd
916
answered Nov 15 '18 at 8:15
LloydLloyd
916
answered Nov 15 '18 at 8:15
LloydLloyd
916
answered Nov 15 '18 at 8:15
LloydLloyd
916
916
Thank you very much Lloyd for your guidance. I tried the code you provided, but unfortunately I still receive the same error : undefined is not a function (near '...fs.writeFile...')
– Glory Glory
Nov 15 '18 at 12:37
add a comment |
Thank you very much Lloyd for your guidance. I tried the code you provided, but unfortunately I still receive the same error : undefined is not a function (near '...fs.writeFile...')
– Glory Glory
Nov 15 '18 at 12:37
Thank you very much Lloyd for your guidance. I tried the code you provided, but unfortunately I still receive the same error : undefined is not a function (near '...fs.writeFile...')
– Glory Glory
Nov 15 '18 at 12:37
Thank you very much Lloyd for your guidance. I tried the code you provided, but unfortunately I still receive the same error : undefined is not a function (near '...fs.writeFile...')
– Glory Glory
Nov 15 '18 at 12:37
add a comment |
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