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Avoid requesting range beyond end of file if file size available #21

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Avoid requesting range beyond end of file if file size available #21

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23 changes: 22 additions & 1 deletion src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,14 @@ export default class Trix {
let { end, buffer } = res
let done = false
const decoder = new TextDecoder('utf8')

let fileSize: number | undefined
try {
fileSize = (await this.ixFile.stat()).size
} catch (e) {
/* do nothing */
}

// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
while (!done) {
let foundSomething = false
Expand Down Expand Up @@ -74,7 +82,20 @@ export default class Trix {
// if we are not done, and we haven't filled up maxResults with hits yet,
// then refetch
if (resultArr.length + hits.length < this.maxResults && !done) {
const res2 = await this.ixFile.read(CHUNK_SIZE, end, opts)
// if we are clear past the end of the file, break
if (fileSize !== undefined && end > fileSize) {
resultArr = resultArr.concat(hits)
break
}

// else if we are requesting past end of file, chop to length of file
const res2 = await this.ixFile.read(
fileSize !== undefined && end + CHUNK_SIZE > fileSize
? fileSize - end
: CHUNK_SIZE,
end,
opts,
)

// early break if empty response
if (res2.length === 0) {
Expand Down