URI 无效：尝试将值字典发布到 API 时 Uri 字符串太长

Question

以下代码正在构建对 API 的发布请求，但在某些情况下，html_text 很大（70,000 个字符以上），这似乎太多导致Invalid URI: The Uri string is too long错误，我找不到解决此问题的方法.

如何增加有效 URI 限制？

public async Task<string> CreateCampaign(string apiKey, string fromName, string fromEmail, string replyTo, string title,
            string subject, string plaintext, string htmltext, string listIds, string segmentIds, string excludeListIds,
            string excludeSegmentIds, string brandId, string queryString, string sendCampaign)
        {
            var values = new Dictionary<string, string>
            {
               { "api_key", apiKey },
               { "from_name", fromName },
               { "from_email", fromEmail },
               { "reply_to", replyTo },
               { "title", title },
               { "subject", subject },
               { "plain_text", plaintext },
               { "html_text", htmltext },
               { "list_ids", listIds },
               { "segment_ids", segmentIds },
               { "exclude_list_ids", excludeListIds },
               { "exclude_segment_ids", excludeSegmentIds },
               { "brand_id", brandId },
               { "query_string", queryString },
               { "send_campaign", sendCampaign },

            };

            var content = new FormUrlEncodedContent(values);
            var response = await client.PostAsync("[Redacted-DOMAIN]/api/campaigns/create.php", content);
            var responseString = await response.Content.ReadAsStringAsync();
            return responseString;
        }
    }

Answer 1

FormUrlEncodedContent 的大小受到限制。

服务器接受 JSON？ 如果是这样你冷试试这个：

var content = new StringContent(serializedValues, Encoding.UTF8, "application/json");

代替

 var content = new FormUrlEncodedContent(values);

如果没有，您可以尝试使用此解决方法：

 var items = formData.Select(i => WebUtility.UrlEncode(i.Key) + "=" + WebUtility.UrlEncode(i.Value));
var content = new StringContent(String.Join("&", items), null, "application/x-www-form-urlencoded");
var response = await client.PostAsync(url, content);