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Extend the importDb() method of both OPFS VFSes to (A) support reading in an async streaming fashion via a callback and (B) automatically disable WAL mode in the imported db.

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FossilOrigin-Name: 9b1398c96a4fd0b59e65faa8d5c98de4129f0f0357732f12cb2f5c53a08acdc2
This commit is contained in:
stephan
2023-08-18 14:16:26 +00:00
parent abfe646c12
commit ccbfe97cd5
6 changed files with 223 additions and 37 deletions
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39
ext/wasm/api/sqlite3-api-prologue.js
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@ -772,8 +772,43 @@ globalThis.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
isSharedTypedArray,
toss: function(...args){throw new Error(args.join(' '))},
toss3,
typedArrayPart
};
typedArrayPart,
/**
Given a byte array or ArrayBuffer, this function throws if the
lead bytes of that buffer do not hold a SQLite3 database header,
else it returns without side effects.
Added in 3.44.
*/
affirmDbHeader: function(bytes){
if(bytes instanceof ArrayBuffer) bytes = new Uint8Array(bytes);
const header = "SQLite format 3";
if( header.length > bytes.byteLength ){
toss3("Input does not contain an SQLite3 database header.");
}
for(let i = 0; i < header.length; ++i){
if( header.charCodeAt(i) !== bytes[i] ){
toss3("Input does not contain an SQLite3 database header.");
}
}
},
/**
Given a byte array or ArrayBuffer, this function throws if the
database does not, at a cursory glance, appear to be an SQLite3
database. It only examines the size and header, but further
checks may be added in the future.
Added in 3.44.
*/
affirmIsDb: function(bytes){
if(bytes instanceof ArrayBuffer) bytes = new Uint8Array(bytes);
const n = bytes.byteLength;
if(n<512 || n%512!==0) {
toss3("Byte array size",n,"is invalid for an SQLite3 db.");
}
util.affirmDbHeader(bytes);
}
}/*util*/;
Object.assign(wasm, {
/**