Apisix-dashboard: proxy-rewrite plugin header data missing

[Applenice]

Please answer these questions before submitting your issue.

• Why do you submit this issue?
• [ ] Question or discussion
• [X] Bug
• [ ] Requirements
• [ ] Feature or performance improvement
• [ ] Other

---

Question

• What do you want to know?

$ git branch -v
* v2.0 6dae80b feat(docs): improve README & Deploy (#785)

Chrome 86.0.4240.198

In the routing configuration，Edit Route->Plugin Config->proxy-rewrite，Click on Setting->Click on the left unconfigured area or cancel -> Click again proxy-rewrite Setting，Header's configuration is missing.

Only the header part of the configuration is missing, the configuration of host, regex_uri, and schema is still there.👀

I've observed the network request. The response is normal.

Request URL: http://192.168.1.118:8080/apisix/admin/routes/328415276909462181
Request Method: GET
Status Code: 200 OK
Remote Address: 192.168.1.118:8080
Referrer Policy: strict-origin-when-cross-origin

The Plugin section of the response contains the header data.

"plugins": {
    "basic-auth": {},
    "proxy-rewrite": {
        "headers": {
            "Accept": {
                "key": "Accept",
                "value": "application/json"
            }
        },
        "host": "xxxxxxx",
        "regex_uri": [
            "^/geo/(.*)$",
            "/json/$1"
        ],
        "scheme": "http"
    }
},

[membphis]

@juzhiyuan @LiteSun please confirm if we need to update the schema of plugin proxy-rewrite

[liuxiran]

Replicated in my local env, checking~