[英]Regular expression to get a Facebook user ID from a graph API URL?
What is a regular expression that will pull the user ID out of a URL of the following format? 什么是将用户ID从以下格式的URL中提取出来的正则表达式? Eg in the example below, I am looking to get "1227627" as a match after applying the regex.
例如,在下面的示例中,我希望在应用正则表达式后获得“ 1227627”作为匹配项。
https://graph.facebook.com/1227627/movies?access_token=[access_token]&limit=5000&offset=5000&__after_id=103108306395658
Note: I will be using this in iOS/objective c. 注意:我将在iOS /目标c中使用它。
For some background-- I'm using the graphi API batch request. 对于某些背景-我正在使用graphi API批处理请求。 A batch request can contain up to 20 individual requests, and unfortunately the individual responses do not return the request URL.
一个批处理请求最多可以包含20个单独的请求,但是不幸的是,单个响应不返回请求URL。 I could keep track of all individual requests but it would be simpler to parse out the user ID the request corresponded to this way.
我可以跟踪所有单独的请求,但是解析出该请求所对应的用户ID会更简单。
You could use 'https?://graph.facebook.com/([0-9]+)/' and the number would be the first capturing group. 您可以使用“ https?://graph.facebook.com/([0-9] +)/”,该数字将是第一个捕获组。
Something along the lines of: 类似于以下内容:
// input URL
NSString *urlString = @"https://graph.facebook.com/1227627/movies?access_token=access_token]&limit=5000&offset=5000&__after_id=103108306395658";
// construct the regex
NSRegularExpression *regex = [NSRegularExpression
regularExpressionWithPattern:@"https?://graph\\.facebook\\.com/([0-9]+)/"
options:NSRegularExpressionSearch
error:nil];
// match against url
NSArray *matches = [regex matchesInString:urlString
options:0
range:NSMakeRange(0, [urlString length])];
// extract capturing group 1
for (NSTextCheckingResult *match in matches) {
NSRange matchRange = [match rangeAtIndex:1];
NSString *matchString = [urlString substringWithRange:matchRange];
NSLog(@"%@", matchString);
}
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