Angular 6 - call multiple APIs synchronously
I have a simple function that call an API to get all categories of story. The response simply like this:
{"page":1,"pageSize":1,"totalRecords":39,"nextPageUrl":"http://dkm.services/api/story/categories?SiteId=1c0ad0e3-8c70-4a0c-9dd1-3285d0b243f2&Page=2&PageSize=10","items":[{"id":"96c9219a-b1a1-4dc5-9dbc-021720d71ab0","name":"Đông Phương","url":"http://truyenfull.vn/the-loai/dong-phuong/"}]}
Now I need to follow the nextPageUrl property to invoke the next call until all category are obtained (nextPageUrl = null)
The function will return an array of category, then it will be called in another component in my app.
How can I chain this multiple calls?
Thank you all.
api asynchronous angular6
asked Jan 3 at 13:38
Nam HPNam HP
165
add a comment |
I have a simple function that call an API to get all categories of story. The response simply like this:
{"page":1,"pageSize":1,"totalRecords":39,"nextPageUrl":"http://dkm.services/api/story/categories?SiteId=1c0ad0e3-8c70-4a0c-9dd1-3285d0b243f2&Page=2&PageSize=10","items":[{"id":"96c9219a-b1a1-4dc5-9dbc-021720d71ab0","name":"Đông Phương","url":"http://truyenfull.vn/the-loai/dong-phuong/"}]}
Now I need to follow the nextPageUrl property to invoke the next call until all category are obtained (nextPageUrl = null)
The function will return an array of category, then it will be called in another component in my app.
How can I chain this multiple calls?
Thank you all.
api asynchronous angular6
asked Jan 3 at 13:38
Nam HPNam HP
165
Promises? developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/…
– JuanDM
Jan 3 at 13:42
yes I can use promise only if I know exactly how many calls I need to invoke, but in my case I don't. I only know what is the current api's url and what is the next (returned from the previous response)
– Nam HP
Jan 3 at 13:57
add a comment |
I have a simple function that call an API to get all categories of story. The response simply like this:
{"page":1,"pageSize":1,"totalRecords":39,"nextPageUrl":"http://dkm.services/api/story/categories?SiteId=1c0ad0e3-8c70-4a0c-9dd1-3285d0b243f2&Page=2&PageSize=10","items":[{"id":"96c9219a-b1a1-4dc5-9dbc-021720d71ab0","name":"Đông Phương","url":"http://truyenfull.vn/the-loai/dong-phuong/"}]}
Now I need to follow the nextPageUrl property to invoke the next call until all category are obtained (nextPageUrl = null)
The function will return an array of category, then it will be called in another component in my app.
How can I chain this multiple calls?
Thank you all.
api asynchronous angular6
asked Jan 3 at 13:38
Nam HPNam HP
165
I have a simple function that call an API to get all categories of story. The response simply like this:
{"page":1,"pageSize":1,"totalRecords":39,"nextPageUrl":"http://dkm.services/api/story/categories?SiteId=1c0ad0e3-8c70-4a0c-9dd1-3285d0b243f2&Page=2&PageSize=10","items":[{"id":"96c9219a-b1a1-4dc5-9dbc-021720d71ab0","name":"Đông Phương","url":"http://truyenfull.vn/the-loai/dong-phuong/"}]}
Now I need to follow the nextPageUrl property to invoke the next call until all category are obtained (nextPageUrl = null)
The function will return an array of category, then it will be called in another component in my app.
How can I chain this multiple calls?
Thank you all.
api asynchronous angular6
api asynchronous angular6
asked Jan 3 at 13:38
Nam HPNam HP
165
asked Jan 3 at 13:38
Nam HPNam HP
165
asked Jan 3 at 13:38
Nam HPNam HP
165
asked Jan 3 at 13:38
Nam HPNam HP
165
asked Jan 3 at 13:38
Nam HPNam HP
165
165
Promises? developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/…
– JuanDM
Jan 3 at 13:42
yes I can use promise only if I know exactly how many calls I need to invoke, but in my case I don't. I only know what is the current api's url and what is the next (returned from the previous response)
– Nam HP
Jan 3 at 13:57
add a comment |
Promises? developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/…
– JuanDM
Jan 3 at 13:42
yes I can use promise only if I know exactly how many calls I need to invoke, but in my case I don't. I only know what is the current api's url and what is the next (returned from the previous response)
– Nam HP
Jan 3 at 13:57
Promises? developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/…
– JuanDM
Jan 3 at 13:42
Promises? developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/…
– JuanDM
Jan 3 at 13:42
yes I can use promise only if I know exactly how many calls I need to invoke, but in my case I don't. I only know what is the current api's url and what is the next (returned from the previous response)
– Nam HP
Jan 3 at 13:57
yes I can use promise only if I know exactly how many calls I need to invoke, but in my case I don't. I only know what is the current api's url and what is the next (returned from the previous response)
– Nam HP
Jan 3 at 13:57
add a comment |
1 Answer
1
active
oldest
votes
You need recursive promise, something like this ...
function getCategories(nextPageUrl, categories) {
return getCategoriesService(nextPageUrl)
.then((res) => {
if(res.nextPageUrl) {
categories.push(res.categories)
return getCategories(res.nextPageUrl, categories);
}
});
}
answered Jan 3 at 15:55
Žarko SelakŽarko Selak
648818
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 need recursive promise, something like this ...
function getCategories(nextPageUrl, categories) {
return getCategoriesService(nextPageUrl)
.then((res) => {
if(res.nextPageUrl) {
categories.push(res.categories)
return getCategories(res.nextPageUrl, categories);
}
});
}
answered Jan 3 at 15:55
Žarko SelakŽarko Selak
648818
add a comment |
You need recursive promise, something like this ...
function getCategories(nextPageUrl, categories) {
return getCategoriesService(nextPageUrl)
.then((res) => {
if(res.nextPageUrl) {
categories.push(res.categories)
return getCategories(res.nextPageUrl, categories);
}
});
}
answered Jan 3 at 15:55
Žarko SelakŽarko Selak
648818
add a comment |
You need recursive promise, something like this ...
function getCategories(nextPageUrl, categories) {
return getCategoriesService(nextPageUrl)
.then((res) => {
if(res.nextPageUrl) {
categories.push(res.categories)
return getCategories(res.nextPageUrl, categories);
}
});
}
answered Jan 3 at 15:55
Žarko SelakŽarko Selak
648818
You need recursive promise, something like this ...
function getCategories(nextPageUrl, categories) {
return getCategoriesService(nextPageUrl)
.then((res) => {
if(res.nextPageUrl) {
categories.push(res.categories)
return getCategories(res.nextPageUrl, categories);
}
});
}
answered Jan 3 at 15:55
Žarko SelakŽarko Selak
648818
answered Jan 3 at 15:55
Žarko SelakŽarko Selak
648818
answered Jan 3 at 15:55
Žarko SelakŽarko Selak
648818
answered Jan 3 at 15:55
Žarko SelakŽarko Selak
648818
648818
add a comment |
add a comment |
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Promises? developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/…
– JuanDM
Jan 3 at 13:42
yes I can use promise only if I know exactly how many calls I need to invoke, but in my case I don't. I only know what is the current api's url and what is the next (returned from the previous response)
– Nam HP
Jan 3 at 13:57