webRequest.onErrorOccurred 侦听器中错误属性的可能值是什么？

Question

我的兴趣是仅在重负载期间处理站点以使自动填充工作。例如，当促销活动开始并且网站蜂拥而至时，它有时会崩溃。我需要捕获站点错误，以便可以从后台脚本重新加载页面。如所述，我们可以得到页面加载错误。

页面加载错误可能是由于网络问题、站点问题、DNS 问题以及站点过载问题造成的。

我只想重新加载网页，以防因某些错误而无法加载。

我为 Chrome 和 Firefox 收集了很多错误代码：

网络::ERR_ABORTED
网络::ERR_EMPTY_RESPONSE
网络::ERR_CONNECTION_TIMED_OUT
网络::ERR_CONNECTION_REFUSED
网络::ERR_CONNECTION_RESET
NS_ERROR_NET_ON_CONNECTING_TO
NS_ERROR_NET_ON_WAITING_FOR
NS_ERROR_NET_ON_CONNECTING_TO

这不是完整列表。我已经看到这些错误，所以我列出了它们。我不想通过反复试验找到它们，而是想知道 (HTML) 页面无法加载时所有错误代码的列表。

这是我想如何使用的示例源代码：

chrome.webRequest.onErrorOccurred.addListener(function (details) 
{
    if ("type" in details && ['main_frame', 'sub_frame'].indexOf(details.type) == -1)
    {
        if (details.url.match(/.js$/))
        {
            console.log("Error in download of this file:", details.url);
        }
        return;
    }

    if (details.tabId == -1)
    {
        return;
    }

    var check_all_errors = function(err)
    {
        var all_errors = [
             "net::ERR_ABORTED",
             "net::ERR_EMPTY_RESPONSE",
             "net::ERR_CONNECTION_TIMED_OUT",
             "net::ERR_CONNECTION_REFUSED",
             "net::ERR_CONNECTION_RESET",
             "NS_ERROR_NET_ON_CONNECTING_TO",
             'NS_ERROR_NET_ON_WAITING_FOR',
             'NS_ERROR_NET_ON_CONNECTING_TO'
        ];

        for( var i=0;i<all_errors.length;++i)
        {
            if( all_errors[i] == err && !ff_validate_false())
            {                
                return true;
            }
        }

        console.log("786 returning false for err "+err);
        return false;
    }

    if (details.url == HOME_URL && check_all_errors(details.error)) //if any error encountered then go to home URL
    {
        setTimeout(function () {
            chrome.tabs.update(details.tabId, {url: HOME_URL});
        }, 1000);
    }
    //FOLLOWING PART IS NOW SHOWN HERE

Answer 1

强烈建议您不要这样做

对于error property ^{^(MDN)} provided in the details object ^{^(MDN)} passed to a webRequest.onErrorOccurred ^{^(MDN)}听众，强烈建议您不要测试那个属性.

Chrome

Chrome source code 说：

You must not parse and act based upon its content.

在this line of code中：

"error": {"type": "string", "description": "The error description. This string is <em>not</em> guaranteed to remain backwards compatible between releases. You must not parse and act based upon its content."}

documentation says:

The error description. This string is not guaranteed to remain backwards compatible between releases. You must not parse and act based upon its content.

火狐

Firefox source code 状态：

You must not parse and act based upon its content.

在this line of code中：

"error": {"type": "string", "description": "The error description. This string is <em>not</em> guaranteed to remain backwards compatible between releases. You must not parse and act based upon its content."}

documentation says:

The error description. This string is an internal error string, may vary from one browser to another, and is not guaranteed to stay the same between releases.

当前可能的 `error` 个值

Chrome

Chrome 在 this file (some associated code 中有可能的错误值列表。该代码是：

{ net::ERR_ABORTED, "aborted" },
{ net::ERR_TIMED_OUT, "tcp.connection.timed_out" },
{ net::ERR_CONNECTION_CLOSED, "tcp.connection.closed" },
{ net::ERR_CONNECTION_RESET, "tcp.connection.reset" },
{ net::ERR_CONNECTION_REFUSED, "tcp.connection.refused" },
{ net::ERR_CONNECTION_ABORTED, "tcp.connection.aborted" },
{ net::ERR_CONNECTION_FAILED, "tcp.connection.failed" },
{ net::ERR_NAME_NOT_RESOLVED, "dns" },
{ net::ERR_SSL_PROTOCOL_ERROR, "ssl.protocol.error" },
{ net::ERR_ADDRESS_INVALID, "tcp.connection.address_invalid" },
{ net::ERR_ADDRESS_UNREACHABLE, "tcp.connection.address_unreachable" },
{ net::ERR_CONNECTION_TIMED_OUT, "tcp.connection.timed_out" },
{ net::ERR_NAME_RESOLUTION_FAILED, "dns" },
{ net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN,
    "ssl.cert.pinned_key_not_in_cert_chain" },
{ net::ERR_CERT_COMMON_NAME_INVALID, "ssl.cert.name_invalid" },
{ net::ERR_CERT_DATE_INVALID, "ssl.cert.date_invalid" },
{ net::ERR_CERT_AUTHORITY_INVALID, "ssl.cert.authority_invalid" },
{ net::ERR_CERT_REVOKED, "ssl.cert.revoked" },
{ net::ERR_CERT_INVALID, "ssl.cert.invalid" },
{ net::ERR_EMPTY_RESPONSE, "http.response.empty" },
{ net::ERR_SPDY_PING_FAILED, "spdy.ping_failed" },
{ net::ERR_SPDY_PROTOCOL_ERROR, "spdy.protocol" },
{ net::ERR_QUIC_PROTOCOL_ERROR, "quic.protocol" },
{ net::ERR_DNS_MALFORMED_RESPONSE, "dns.protocol" },
{ net::ERR_DNS_SERVER_FAILED, "dns.server" },
{ net::ERR_DNS_TIMED_OUT, "dns.timed_out" },
{ net::ERR_INSECURE_RESPONSE, "ssl" },
{ net::ERR_CONTENT_LENGTH_MISMATCH, "http.response.content_length_mismatch" },
{ net::ERR_INCOMPLETE_CHUNKED_ENCODING,
    "http.response.incomplete_chunked_encoding" },
{ net::ERR_SSL_VERSION_OR_CIPHER_MISMATCH,
    "ssl.version_or_cipher_mismatch" },
{ net::ERR_BAD_SSL_CLIENT_AUTH_CERT, "ssl.bad_client_auth_cert" },
{ net::ERR_INVALID_CHUNKED_ENCODING,
    "http.response.invalid_chunked_encoding" },
{ net::ERR_RESPONSE_HEADERS_TRUNCATED, "http.response.headers.truncated" },
{ net::ERR_REQUEST_RANGE_NOT_SATISFIABLE,
    "http.request.range_not_satisfiable" },
{ net::ERR_INVALID_RESPONSE, "http.response.invalid" },
{ net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION,
    "http.response.headers.multiple_content_disposition" },
{ net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_LENGTH,
    "http.response.headers.multiple_content_length" },
{ net::ERR_SSL_UNRECOGNIZED_NAME_ALERT, "ssl.unrecognized_name_alert" }

这意味着 Chrome 的可能值为：

net::ERR_ABORTED
net::ERR_TIMED_OUT
net::ERR_CONNECTION_CLOSED
net::ERR_CONNECTION_RESET
net::ERR_CONNECTION_REFUSED
net::ERR_CONNECTION_ABORTED
net::ERR_CONNECTION_FAILED
net::ERR_NAME_NOT_RESOLVED
net::ERR_SSL_PROTOCOL_ERROR
net::ERR_ADDRESS_INVALID
net::ERR_ADDRESS_UNREACHABLE
net::ERR_CONNECTION_TIMED_OUT
net::ERR_NAME_RESOLUTION_FAILED
net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN
net::ERR_CERT_COMMON_NAME_INVALID
net::ERR_CERT_DATE_INVALID
net::ERR_CERT_AUTHORITY_INVALID
net::ERR_CERT_REVOKED
net::ERR_CERT_INVALID
net::ERR_EMPTY_RESPONSE
net::ERR_SPDY_PING_FAILED
net::ERR_SPDY_PROTOCOL_ERROR
net::ERR_QUIC_PROTOCOL_ERROR
net::ERR_DNS_MALFORMED_RESPONSE
net::ERR_DNS_SERVER_FAILED
net::ERR_DNS_TIMED_OUT
net::ERR_INSECURE_RESPONSE
net::ERR_CONTENT_LENGTH_MISMATCH
net::ERR_INCOMPLETE_CHUNKED_ENCODING
net::ERR_SSL_VERSION_OR_CIPHER_MISMATCH
net::ERR_BAD_SSL_CLIENT_AUTH_CERT
net::ERR_INVALID_CHUNKED_ENCODING
net::ERR_RESPONSE_HEADERS_TRUNCATED
net::ERR_REQUEST_RANGE_NOT_SATISFIABLE
net::ERR_INVALID_RESPONSE
net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION
net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_LENGTH
net::ERR_SSL_UNRECOGNIZED_NAME_ALERT

火狐

Firefox 有点复杂。 WebExtensions 是一个 API 分层在 Firefox 使用的 APIs 之上（并暴露给其他类型的 add-ons）。 Firefox 代码通过以下方式更改了从底层 API 获得的 error-text 响应：

let prefix = /^(?:ACTIVITY_SUBTYPE_|STATUS_)/;
let map = new Map();
for (let iface of [nsIHttpActivityObserver, nsISocketTransport]) {
  for (let c of Object.keys(iface).filter(name => prefix.test(name))) {
    map.set(iface[c], c.replace(prefix, "NS_ERROR_NET_ON_"));
  }
}

可能的 ACTIVITY_SUBTYPE_ 属性的代码在文件 nsIHttpActivityObserver.idl and the definitions for the possible STATUS_ properties is in nsISocketTransport.idl 中。执行适当的 RegEx 替换会产生以下可能的值：

NS_ERROR_NET_ON_RESOLVING
NS_ERROR_NET_ON_RESOLVED
NS_ERROR_NET_ON_CONNECTING_TO
NS_ERROR_NET_ON_CONNECTED_TO
NS_ERROR_NET_ON_SENDING_TO
NS_ERROR_NET_ON_WAITING_FOR
NS_ERROR_NET_ON_RECEIVING_FROM
NS_ERROR_NET_ON_REQUEST_HEADER
NS_ERROR_NET_ON_REQUEST_BODY_SENT
NS_ERROR_NET_ON_RESPONSE_START
NS_ERROR_NET_ON_RESPONSE_HEADER
NS_ERROR_NET_ON_RESPONSE_COMPLETE
NS_ERROR_NET_ON_TRANSACTION_CLOSE

webRequest.onErrorOccurred 侦听器中错误属性的可能值是什么？

What are the possible values for the error property in a webRequest.onErrorOccurred listener?

javascript

google-chrome-extension

firefox-addon-webextensions

强烈建议您不要这样做

Chrome

火狐

当前可能的 `error` 个值

Chrome

火狐

webRequest.onErrorOccurred 侦听器中错误 属性 的可能值是什么？

What are the possible values for the error property in a webRequest.onErrorOccurred listener?

javascript

google-chrome-extension

firefox-addon-webextensions

强烈建议您不要这样做

Chrome

火狐

当前可能的 error 个值

Chrome

火狐

webRequest.onErrorOccurred 侦听器中错误属性的可能值是什么？

当前可能的 `error` 个值