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[#] 下载图片失败 回调 null / download failed callback null #114

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[#] 下载图片失败 回调 null / download failed callback null #114

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0d8c85d
[#] 下载图片失败 回调 null
mataoct May 16, 2019
7d95e9d
[#]修复 下载失败缓存状态不正确的BUG
mataoct May 16, 2019
33ae4ad
[#] bug fix
mataoct May 16, 2019
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22 changes: 16 additions & 6 deletions src/index.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ const SHA1 = require("crypto-js/sha1");
const s4 = () => Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
const BASE_DIR = RNFetchBlob.fs.dirs.CacheDir + "/react-native-img-cache";
const FILE_PREFIX = Platform.OS === "ios" ? "" : "file://";
export type CacheHandler = (path: string) => void;
export type CacheHandler = (path: string|null) => void;

export interface CachedImageURISource extends ImageURISource {
uri: string;
Expand Down Expand Up @@ -102,13 +102,19 @@ export class ImageCache {
cache.downloading = true;
const method = source.method ? source.method : "GET";
cache.task = RNFetchBlob.config({ path }).fetch(method, uri, source.headers);
cache.task.then(() => {
cache.task.then((res: any) => {
cache.downloading = false;
cache.path = path;
this.notify(uri);
if (res.respInfo.status >= 400) {
RNFetchBlob.fs.unlink(path);
this.notify(uri, false);
} else {
cache.path = path;
this.notify(uri, true);
}
}).catch(() => {
cache.downloading = false;
RNFetchBlob.fs.unlink(path);
this.notify(uri, false);
});
}
}
Expand All @@ -130,10 +136,14 @@ export class ImageCache {

}

private notify(uri: string) {
private notify(uri: string, status = true) {
const handlers = this.cache[uri].handlers;
handlers.forEach(handler => {
handler(this.cache[uri].path as string);
if (status) {
handler(this.cache[uri].path as string);
} else {
handler(null);
}
});
}
}
Expand Down