When it comes to parsing XML/CSV/JSON/... documents, there are 2 approaches to consider:
DOM loading: loads all the document, making it easy to navigate and parse, and as such provides maximum flexibility for developers.
Streaming: implies iterating through the document, acts like a cursor and stops at each element in its way, thus avoiding memory overkill.
https://www.linkedin.com/pulse/processing-xml-documents-dom-vs-streaming-marius-ilina/
Thus, when it comes to big files, callbacks will be executed meanwhile file is downloading and will be much more efficient as far as memory is concerned.
composer require rodenastyle/stream-parser
Delegate as possible the callback execution so it doesn't blocks the document reading:
(Laravel Queue based example)
use Tightenco\Collect\Support\Collection;
StreamParser::xml("https://example.com/users.xml")->each(function(Collection $user){
dispatch(new App\Jobs\SendEmail($user));
});<bookstore>
<book ISBN="10-000000-001">
<title>The Iliad and The Odyssey</title>
<price>12.95</price>
<comments>
<userComment rating="4">
Best translation I've read.
</userComment>
<userComment rating="2">
I like other versions better.
</userComment>
</comments>
</book>
[...]
</bookstore>use Tightenco\Collect\Support\Collection;
StreamParser::xml("https://example.com/books.xml")->each(function(Collection $book){
var_dump($book);
var_dump($book->get('comments')->toArray());
});class Tightenco\Collect\Support\Collection#19 (1) {
protected $items =>
array(4) {
'ISBN' =>
string(13) "10-000000-001"
'title' =>
string(25) "The Iliad and The Odyssey"
'price' =>
string(5) "12.95"
'comments' =>
class Tightenco\Collect\Support\Collection#17 (1) {
protected $items =>
array(2) {
...
}
}
}
}
array(2) {
[0] =>
array(2) {
'rating' =>
string(1) "4"
'userComment' =>
string(27) "Best translation I've read."
}
[1] =>
array(2) {
'rating' =>
string(1) "2"
'userComment' =>
string(29) "I like other versions better."
}
}
[
{
"title": "The Iliad and The Odyssey",
"price": 12.95,
"comments": [
{"comment": "Best translation I've read."},
{"comment": "I like other versions better."}
]
},
{
"title": "Anthology of World Literature",
"price": 24.95,
"comments": [
{"comment": "Needs more modern literature."},
{"comment": "Excellent overview of world literature."}
]
}
]use Tightenco\Collect\Support\Collection;
StreamParser::json("https://example.com/books.json")->each(function(Collection $book){
var_dump($book->get('comments')->count());
});int(2)
int(2)
title,price,comments
The Iliad and The Odyssey,12.95,"Best translation I've read.,I like other versions better."
Anthology of World Literature,24.95,"Needs more modern literature.,Excellent overview of world literature."
use Tightenco\Collect\Support\Collection;
StreamParser::csv("https://example.com/books.csv")->each(function(Collection $book){
var_dump($book->get('comments')->last());
});string(29) "I like other versions better."
string(39) "Excellent overview of world literature."
This library is released under MIT license.
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