xmlstarlet无法加载外部实体

我的脚本是一个简单的单行程序，它使用curl获取带有xml输出的URL。我试图仅输出以下标记中的文本：

<TEXT>No Hosts Queued for Purging</TEXT>

不使用xmlstarlet时，curl输出如下所示：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE BATCH_RETURN SYSTEM "https://qualysapi.qualys.com/api/2.0/batch_return.dtd">
<BATCH_RETURN>
  <RESPONSE>
    <DATETIME>2017-04-20T20:27:15Z</DATETIME>
    <BATCH_LIST>
      <BATCH>
        <CODE>1921</CODE>
        <TEXT>No Hosts Queued for Purging</TEXT>
      </BATCH>
    </BATCH_LIST>
  </RESPONSE>
</BATCH_RETURN>

failed to load external entity "https://qualysapi.qualys.com/api/2.0/batch_return.dtd"
TYPE BATCH_RETURN SYSTEM "https://qualysapi.qualys.com/api/2.0/batch_return.dtd"
                                                                               ^

我在使用xmlstarlet时遇到以下错误：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE BATCH_RETURN SYSTEM "https://qualysapi.qualys.com/api/2.0/batch_return.dtd">
<BATCH_RETURN>
  <RESPONSE>
    <DATETIME>2017-04-20T20:27:15Z</DATETIME>
    <BATCH_LIST>
      <BATCH>
        <CODE>1921</CODE>
        <TEXT>No Hosts Queued for Purging</TEXT>
      </BATCH>
    </BATCH_LIST>
  </RESPONSE>
</BATCH_RETURN>

failed to load external entity "https://qualysapi.qualys.com/api/2.0/batch_return.dtd"
TYPE BATCH_RETURN SYSTEM "https://qualysapi.qualys.com/api/2.0/batch_return.dtd"
                                                                               ^

---

在执行查询之前，可以使用

fo-D

删除doctype（

sel

）：

curl -u username:password \
     -H 'X-Requested-With:QualysApiExplorer' \
     'https://qualysapi.qualys.com:443/api/2.0/fo/asset/host/' \
     -d "action=purge&ips=$1&" | \
     xmlstarlet fo -D | \
     xmlstarlet sel -t -v "BATCH_RETURN/RESPONSE/BATCH_LIST/BATCH/TEXT"