fopen 有大小限制吗？

发布于 2024-08-05 09:09:36 字数 4633 浏览 3 评论 0原文

我在 php 中使用 fopen 时遇到问题。

如果我手动打开所需的 URL，我会得到：

OK,13:24:34.236 INFO [10] org.mortbay.http.SocketListener - Started SocketListener on 0.0.0.0:4443 13:24:34.236 INFO [10] org.mortbay.util.Container - Started org.mortbay.jetty.Server@52fe85 13:24:39.251 INFO [11] org.mortbay.util.Credential - Checking Resource aliases 13:24:39.251 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: getNewBrowserSession[*firefox, http://dev.REPLACED.com] on session null 13:24:39.251 INFO [11] org.openqa.selenium.server.BrowserSessionFactory - creating new remote session 13:24:39.939 INFO [11] org.openqa.selenium.server.BrowserSessionFactory - Allocated session 179f69cb121941e3b45c7312664de890 for http://dev.REPLACED.com, launching... 13:24:40.048 INFO [11] org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher - Preparing Firefox profile... 13:24:47.751 INFO [11] org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher - Launching Firefox... 13:25:01.751 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK,179f69cb121941e3b45c7312664de890 on session 179f69cb121941e3b45c7312664de890 13:25:01.861 INFO [18] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: windowMaximize[, ] on session 179f69cb121941e3b45c7312664de890 13:25:03.657 INFO [18] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:04.267 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: open[index.php?module=authsystem&func=logout, ] on session 179f69cb121941e3b45c7312664de890 13:25:11.064 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:11.673 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: waitForPageToLoad[30000, ] on session 179f69cb121941e3b45c7312664de890 13:25:11.814 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:12.407 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: type[uname4, Selenium] on session 179f69cb121941e3b45c7312664de890 13:25:12.423 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:13.079 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: type[pass4, casetester] on session 179f69cb121941e3b45c7312664de890 13:25:13.111 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:13.704 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: click[rememberme4, ] on session 179f69cb121941e3b45c7312664de890 13:25:13.782 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:14.361 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: click[//input[@value='Log In'], ] on session 179f69cb121941e3b45c7312664de890 13:25:14.517 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:15.095 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: waitForPageToLoad[30000, ] on session 179f69cb121941e3b45c7312664de890 13:25:16.001 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:16.642 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: click[link=REPLACED, ] on session 179f69cb121941e3b45c7312664de890 13:25:16.751 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:17.345 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: waitForPageToLoad[30000, ] on session 179f69cb121941e3b45c7312664de890 13:25:19.532 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:26.204 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: retrieveLastRemoteControlLogs[, ] on session 179f69cb121941e3b45c7312664de890

现在，如果我使用 fopen 打开该 url：

echo fopen($myurl, "r");

显示的内容被剪切为 1330 个字符... 为了按预期接收整个内容，我是否应该更改一些限制？

原文

I'm having problems using fopen in php.

If I open the desired URL by hand I get:

OK,13:24:34.236 INFO [10] org.mortbay.http.SocketListener - Started SocketListener on 0.0.0.0:4443 13:24:34.236 INFO [10] org.mortbay.util.Container - Started org.mortbay.jetty.Server@52fe85 13:24:39.251 INFO [11] org.mortbay.util.Credential - Checking Resource aliases 13:24:39.251 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: getNewBrowserSession[*firefox, http://dev.REPLACED.com] on session null 13:24:39.251 INFO [11] org.openqa.selenium.server.BrowserSessionFactory - creating new remote session 13:24:39.939 INFO [11] org.openqa.selenium.server.BrowserSessionFactory - Allocated session 179f69cb121941e3b45c7312664de890 for http://dev.REPLACED.com, launching... 13:24:40.048 INFO [11] org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher - Preparing Firefox profile... 13:24:47.751 INFO [11] org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher - Launching Firefox... 13:25:01.751 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK,179f69cb121941e3b45c7312664de890 on session 179f69cb121941e3b45c7312664de890 13:25:01.861 INFO [18] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: windowMaximize[, ] on session 179f69cb121941e3b45c7312664de890 13:25:03.657 INFO [18] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:04.267 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: open[index.php?module=authsystem&func=logout, ] on session 179f69cb121941e3b45c7312664de890 13:25:11.064 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:11.673 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: waitForPageToLoad[30000, ] on session 179f69cb121941e3b45c7312664de890 13:25:11.814 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:12.407 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: type[uname4, Selenium] on session 179f69cb121941e3b45c7312664de890 13:25:12.423 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:13.079 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: type[pass4, casetester] on session 179f69cb121941e3b45c7312664de890 13:25:13.111 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:13.704 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: click[rememberme4, ] on session 179f69cb121941e3b45c7312664de890 13:25:13.782 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:14.361 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: click[//input[@value='Log In'], ] on session 179f69cb121941e3b45c7312664de890 13:25:14.517 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:15.095 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: waitForPageToLoad[30000, ] on session 179f69cb121941e3b45c7312664de890 13:25:16.001 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:16.642 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: click[link=REPLACED, ] on session 179f69cb121941e3b45c7312664de890 13:25:16.751 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:17.345 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: waitForPageToLoad[30000, ] on session 179f69cb121941e3b45c7312664de890 13:25:19.532 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Got result: OK on session 179f69cb121941e3b45c7312664de890 13:25:26.204 INFO [11] org.openqa.selenium.server.SeleniumDriverResourceHandler - Command request: retrieveLastRemoteControlLogs[, ] on session 179f69cb121941e3b45c7312664de890

Now, if I open that url using fopen:

echo fopen($myurl, "r");

The content displayed is cut in 1330 chars...
Is there a limitation I should change for this whole content to be received as expected?

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寂寞花火° 2024-08-12 09:09:36

首先：

echo fopen($myurl, "r");

显然这是行不通的。我想你的意思是：

$handle = fopen($myurl, "r");
echo(fread($handle, $some_size));
fclose($handle);

在那种情况下你做错了。 fread() 不保证在一次调用中返回所有数据；有时您需要多次调用它才能获取完整的输入。如果远程 HTTP 服务器使用 Transfer-Encoding: chunked，则尤其如此。

有关详细信息，请参阅fread() 文档。引用文档：

当读取任何非常规本地文件时，例如读取远程文件或从 popen() 和 fsockopen() 返回的流时，读取将在数据包可用后停止。这意味着您应该将数据分块收集在一起，如下例所示。

$handle = fopen("http://www.example.com/", "rb");
$contents = '';
while (!feof($handle)) {
  $contents .= fread($handle, 8192);
}
fclose($handle);

一个更简单的解决方案是使用 file_get_contents()。但是，此函数将整个文件写入单个字符串，这可能会或可能不会损害性能，具体取决于您对网页输入的处理方式。

First of all:

echo fopen($myurl, "r");

Obviously isn't going to work. I assume you meant:

$handle = fopen($myurl, "r");
echo(fread($handle, $some_size));
fclose($handle);

In that case you're doing it wrong. fread() is not guaranteed to return all the data in one call; sometimes you need to call it multiple times to get the whole input. This is especially true if the remote HTTP server uses Transfer-Encoding: chunked.

See the fread() documentation for more information. Quoting the documentation:

When reading from anything that is not a regular local file, such as streams returned when reading remote files or from popen() and fsockopen(), reading will stop after a packet is available. This means that you should collect the data together in chunks as shown in the examples below.

$handle = fopen("http://www.example.com/", "rb");
$contents = '';
while (!feof($handle)) {
  $contents .= fread($handle, 8192);
}
fclose($handle);

A simpler solution would be to use file _ get _ contents(). However this function writes the entire file into a single string, which may or may not hurt performance depending on what you do with the input from the web page.

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