小编bul*_*che的帖子

假设以下路由访问xml文件以使用给定的xpath(？key =)替换特定标记的文本:

@app.route('/resource', methods = ['POST'])
def update_text():
    # CODE

然后,我会像这样使用cURL:

curl -X POST http://ip:5000/resource?key=listOfUsers/user1 -d "John"

xpath expreesion listOfUsers/user1应该访问标记<user1>以将其当前文本更改为"John".

我不知道如何实现这一点,因为我刚刚开始学习Flask和REST,我找不到任何关于这个具体案例的好例子.此外,我想使用lxml来操作xml文件,因为我已经知道了.

有人可以帮助并提供一个指导我的例子吗？

我一直在努力理解为什么某些 HTTP 端点为“probe_success”和“probe_http_status_code”返回“0”，同时完全能够通过curl获得“有效”响应。

例子：curl -s "localhost:9115/probe?target=http://linux.org&module=http_2xx" | grep -v '^#'

输出：

probe_dns_lookup_time_seconds 0.003712821
probe_duration_seconds 0.212811871
probe_failed_due_to_regex 0
probe_http_content_length 0
probe_http_duration_seconds{phase="connect"} 0.002263513
probe_http_duration_seconds{phase="processing"} 0.196389853
probe_http_duration_seconds{phase="resolve"} 0.006723945
probe_http_duration_seconds{phase="tls"} 0
probe_http_duration_seconds{phase="transfer"} 2.6001e-05
probe_http_redirects 1
probe_http_ssl 0
probe_http_status_code 0
probe_http_version 0
probe_ip_protocol 4
probe_success 0

这是工作定义：

  - job_name: 'blackbox'
    scrape_interval: 30s
    metrics_path: /probe
    params:
      module: [http_2xx]
    static_configs:
      - targets:
        - http://linux.org
    relabel_configs:
      - source_labels: [__address__]
        regex: '(.*)(:80)?'
        target_label: __param_target
      - source_labels: [__param_target]
        regex: '(.*)'
        target_label: instance
        replacement: '${1}'
      - source_labels: []
        regex: '.*' …

只有两个问题:

1. 如何检查分配给变量的字符串是否对应于有效的XPath表达式？
2. 如果请求的资源不存在,如何返回自定义错误消息？

这是我尝试安装 Slack 时的输出。

$ sudo dpkg -i slack-desktop-4.12.2-amd64.deb 
Selecting previously unselected package slack-desktop.
(Reading database ... 155664 files and directories currently installed.)
Preparing to unpack slack-desktop-4.12.2-amd64.deb ...
Unpacking slack-desktop (4.12.2) ...
dpkg: dependency problems prevent configuration of slack-desktop:
 slack-desktop depends on libappindicator3-1; however:
  Package libappindicator3-1 is not installed.

dpkg: error processing package slack-desktop (--install):
 dependency problems - leaving unconfigured
Processing triggers for desktop-file-utils (0.26-1) ...
Processing triggers for mailcap (3.68) ...
Errors were encountered while processing:
 slack-desktop

然后我尝试安装依赖项

$ sudo …

我在一行中有以下For循环:

var = ''.join('%02x' % ord(b) for b in string_var)

如何在常规for循环中显示？