现有的答案指出curl可以从文件中发布数据，并使用heredocs来避免过多的引号转义，并清楚地将JSON分离到新的行。然而，不需要定义函数或从cat获取输出，因为curl可以发布来自标准输入的数据。我觉得这个表格很有可读性:

curl -X POST -H 'Content-Type:application/json' --data '$@-' ${API_URL} << EOF
{
  "account": {
    "email": "$email",
    "screenName": "$screenName",
    "type": "$theType",
    "passwordSettings": {
      "password": "$password",
      "passwordConfirm": "$password"
    }
  },
  "firstName": "$firstName",
  "lastName": "$lastName",
  "middleName": "$middleName",
  "locale": "$locale",
  "registrationSiteId": "$registrationSiteId",
  "receiveEmail": "$receiveEmail",
  "dateOfBirth": "$dob",
  "mobileNumber": "$mobileNumber",
  "gender": "$gender",
  "fuelActivationDate": "$fuelActivationDate",
  "postalCode": "$postalCode",
  "country": "$country",
  "city": "$city",
  "state": "$state",
  "bio": "$bio",
  "jpFirstNameKana": "$jpFirstNameKana",
  "jpLastNameKana": "$jpLastNameKana",
  "height": "$height",
  "weight": "$weight",
  "distanceUnit": "MILES",
  "weightUnit": "POUNDS",
  "heightUnit": "FT/INCHES"
}
EOF

这个脚本将使用指定的JSON主体向指定的URL发送POST请求，并将服务器的响应输出到控制台:

#!/bin/bash

# Set the URL to send the request to
url='http://example.com/endpoint'

# Set the JSON body of the request
json_data='{"key1": "value1", "key2": "value2"}'

# Make the POST request with the JSON body
response=$(curl -X POST -H "Content-Type: application/json" -d "$json_data" "$url")

echo "Response from server: $response"

把数据放入txt文件对我来说很有效

bash --version
GNU bash, version 4.2.46(2)-release (x86_64-redhat-linux-gnu)
curl --version
curl 7.29.0 (x86_64-redhat-linux-gnu)
 cat curl_data.txt 
 {  "type":"index-pattern", "excludeExportDetails": true  }

curl -X POST http://localhost:30560/api/saved_objects/_export -H 'kbn-xsrf: true' -H 'Content-Type: application/json' -d "$(cat curl_data.txt)" -o out.json

以下是我从下面的回答中得到的建议:

export BASH_VARIABLE="[1,2,3]"
curl http://localhost:8080/path -d "$(cat <<EOF
{
  "name": $BASH_VARIABLE,
  "something": [
    "value1",
    "value2",
    "value3"
  ]
}
EOF
)" -H 'Content-Type: application/json'

几年之后，如果你使用eval或backtick替换，这可能会帮助到一些人:

postDataJson="{\"guid\":\"$guid\",\"auth_token\":\"$token\"}"

使用sed从响应的开头和结尾去掉引号

$(curl --silent -H "Content-Type: application/json" https://${target_host}/runs/get-work -d ${postDataJson} | sed -e 's/^"//' -e 's/"$//')

工作很好，刚刚创建了post_data函数，并在shell调用中调用它。